/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/eca-rers2012/Problem03_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 15:04:38,630 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 15:04:38,695 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 15:04:38,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 15:04:38,698 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 15:04:38,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 15:04:38,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 15:04:38,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 15:04:38,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 15:04:38,716 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 15:04:38,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 15:04:38,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 15:04:38,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 15:04:38,718 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 15:04:38,719 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 15:04:38,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 15:04:38,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 15:04:38,719 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 15:04:38,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 15:04:38,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 15:04:38,720 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 15:04:38,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 15:04:38,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 15:04:38,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 15:04:38,720 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 15:04:38,721 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 15:04:38,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 15:04:38,721 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 15:04:38,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 15:04:38,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 15:04:38,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 15:04:38,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 15:04:38,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 15:04:38,723 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 15:04:38,723 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 15:04:38,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 15:04:38,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 15:04:38,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 15:04:38,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 15:04:38,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 15:04:38,724 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 15:04:38,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 15:04:38,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 15:04:38,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 15:04:38,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 15:04:38,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 15:04:38,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 15:04:38,905 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 15:04:38,905 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 15:04:38,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label11.c [2023-12-20 15:04:39,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 15:04:40,277 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 15:04:40,278 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c [2023-12-20 15:04:40,294 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b199b740/0a9164df56994d918a9a3ccf37eb5718/FLAGfadb0785f [2023-12-20 15:04:40,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b199b740/0a9164df56994d918a9a3ccf37eb5718 [2023-12-20 15:04:40,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 15:04:40,310 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 15:04:40,311 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 15:04:40,312 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 15:04:40,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 15:04:40,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:40,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bff1462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40, skipping insertion in model container [2023-12-20 15:04:40,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:40,368 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 15:04:40,713 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c[60283,60296] [2023-12-20 15:04:40,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 15:04:40,747 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 15:04:40,868 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c[60283,60296] [2023-12-20 15:04:40,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 15:04:40,923 INFO L206 MainTranslator]: Completed translation [2023-12-20 15:04:40,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40 WrapperNode [2023-12-20 15:04:40,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 15:04:40,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 15:04:40,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 15:04:40,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 15:04:40,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:40,958 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,026 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-12-20 15:04:41,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 15:04:41,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 15:04:41,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 15:04:41,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 15:04:41,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,042 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,081 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 15:04:41,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,139 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,151 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 15:04:41,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 15:04:41,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 15:04:41,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 15:04:41,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (1/1) ... [2023-12-20 15:04:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 15:04:41,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:41,191 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 15:04:41,222 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 15:04:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 15:04:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 15:04:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 15:04:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 15:04:41,308 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 15:04:41,310 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 15:04:42,566 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 15:04:42,596 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 15:04:42,596 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-20 15:04:42,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 03:04:42 BoogieIcfgContainer [2023-12-20 15:04:42,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 15:04:42,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 15:04:42,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 15:04:42,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 15:04:42,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 03:04:40" (1/3) ... [2023-12-20 15:04:42,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5019e7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 03:04:42, skipping insertion in model container [2023-12-20 15:04:42,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:40" (2/3) ... [2023-12-20 15:04:42,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5019e7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 03:04:42, skipping insertion in model container [2023-12-20 15:04:42,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 03:04:42" (3/3) ... [2023-12-20 15:04:42,603 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label11.c [2023-12-20 15:04:42,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 15:04:42,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 15:04:42,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 15:04:42,653 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;@8ace4fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 15:04:42,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 15:04:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 238 states have (on average 1.9201680672268908) internal successors, (457), 239 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-12-20 15:04:42,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:42,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:42,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:42,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 315161196, now seen corresponding path program 1 times [2023-12-20 15:04:42,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:42,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446902232] [2023-12-20 15:04:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:42,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:43,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446902232] [2023-12-20 15:04:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446902232] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:43,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:43,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492927716] [2023-12-20 15:04:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 15:04:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 15:04:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 15:04:43,058 INFO L87 Difference]: Start difference. First operand has 240 states, 238 states have (on average 1.9201680672268908) internal successors, (457), 239 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:43,088 INFO L93 Difference]: Finished difference Result 479 states and 913 transitions. [2023-12-20 15:04:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 15:04:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2023-12-20 15:04:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:43,097 INFO L225 Difference]: With dead ends: 479 [2023-12-20 15:04:43,097 INFO L226 Difference]: Without dead ends: 238 [2023-12-20 15:04:43,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 15:04:43,102 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:43,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 15:04:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-20 15:04:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-12-20 15:04:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.6540084388185654) internal successors, (392), 237 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 392 transitions. [2023-12-20 15:04:43,135 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 392 transitions. Word has length 192 [2023-12-20 15:04:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:43,135 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 392 transitions. [2023-12-20 15:04:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 392 transitions. [2023-12-20 15:04:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-12-20 15:04:43,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:43,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 15:04:43,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:43,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1347855294, now seen corresponding path program 1 times [2023-12-20 15:04:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:43,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411511063] [2023-12-20 15:04:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:43,512 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 15:04:43,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411511063] [2023-12-20 15:04:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411511063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:43,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190389867] [2023-12-20 15:04:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:43,520 INFO L87 Difference]: Start difference. First operand 238 states and 392 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:44,235 INFO L93 Difference]: Finished difference Result 686 states and 1135 transitions. [2023-12-20 15:04:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2023-12-20 15:04:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:44,238 INFO L225 Difference]: With dead ends: 686 [2023-12-20 15:04:44,238 INFO L226 Difference]: Without dead ends: 449 [2023-12-20 15:04:44,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:44,240 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 85 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:44,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 90 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:04:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-12-20 15:04:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2023-12-20 15:04:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.6233183856502242) internal successors, (724), 446 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 724 transitions. [2023-12-20 15:04:44,253 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 724 transitions. Word has length 192 [2023-12-20 15:04:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:44,254 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 724 transitions. [2023-12-20 15:04:44,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 724 transitions. [2023-12-20 15:04:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-20 15:04:44,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:44,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:44,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 15:04:44,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:44,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash 948459848, now seen corresponding path program 1 times [2023-12-20 15:04:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:44,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925854464] [2023-12-20 15:04:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:44,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:44,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:44,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925854464] [2023-12-20 15:04:44,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925854464] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:44,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:44,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:44,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194812445] [2023-12-20 15:04:44,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:44,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:44,440 INFO L87 Difference]: Start difference. First operand 447 states and 724 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:45,028 INFO L93 Difference]: Finished difference Result 1317 states and 2138 transitions. [2023-12-20 15:04:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2023-12-20 15:04:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:45,031 INFO L225 Difference]: With dead ends: 1317 [2023-12-20 15:04:45,031 INFO L226 Difference]: Without dead ends: 871 [2023-12-20 15:04:45,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:45,034 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:45,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 156 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:04:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-12-20 15:04:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 867. [2023-12-20 15:04:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.5277136258660509) internal successors, (1323), 866 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1323 transitions. [2023-12-20 15:04:45,047 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1323 transitions. Word has length 197 [2023-12-20 15:04:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:45,047 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1323 transitions. [2023-12-20 15:04:45,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1323 transitions. [2023-12-20 15:04:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-12-20 15:04:45,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:45,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 15:04:45,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:45,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 726042367, now seen corresponding path program 1 times [2023-12-20 15:04:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:45,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121272503] [2023-12-20 15:04:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:45,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:45,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:45,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121272503] [2023-12-20 15:04:45,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121272503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:45,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:45,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653741453] [2023-12-20 15:04:45,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:45,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:45,179 INFO L87 Difference]: Start difference. First operand 867 states and 1323 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:45,784 INFO L93 Difference]: Finished difference Result 2565 states and 3930 transitions. [2023-12-20 15:04:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2023-12-20 15:04:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:45,789 INFO L225 Difference]: With dead ends: 2565 [2023-12-20 15:04:45,789 INFO L226 Difference]: Without dead ends: 1699 [2023-12-20 15:04:45,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:45,791 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:45,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 88 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:04:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2023-12-20 15:04:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1683. [2023-12-20 15:04:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 1.4982164090368608) internal successors, (2520), 1682 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2520 transitions. [2023-12-20 15:04:45,811 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2520 transitions. Word has length 200 [2023-12-20 15:04:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:45,811 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 2520 transitions. [2023-12-20 15:04:45,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2520 transitions. [2023-12-20 15:04:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-20 15:04:45,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:45,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:45,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 15:04:45,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:45,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash -746198684, now seen corresponding path program 1 times [2023-12-20 15:04:45,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:45,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303346518] [2023-12-20 15:04:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303346518] [2023-12-20 15:04:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303346518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:46,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:46,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384711750] [2023-12-20 15:04:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:46,048 INFO L87 Difference]: Start difference. First operand 1683 states and 2520 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:46,724 INFO L93 Difference]: Finished difference Result 4187 states and 6246 transitions. [2023-12-20 15:04:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2023-12-20 15:04:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:46,730 INFO L225 Difference]: With dead ends: 4187 [2023-12-20 15:04:46,731 INFO L226 Difference]: Without dead ends: 2505 [2023-12-20 15:04:46,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:46,733 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:46,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 111 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:04:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2023-12-20 15:04:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2504. [2023-12-20 15:04:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 1.4702357171394327) internal successors, (3680), 2503 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 3680 transitions. [2023-12-20 15:04:46,765 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 3680 transitions. Word has length 202 [2023-12-20 15:04:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:46,765 INFO L495 AbstractCegarLoop]: Abstraction has 2504 states and 3680 transitions. [2023-12-20 15:04:46,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 3680 transitions. [2023-12-20 15:04:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-12-20 15:04:46,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:46,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 15:04:46,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:46,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash -616042546, now seen corresponding path program 1 times [2023-12-20 15:04:46,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:46,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942004420] [2023-12-20 15:04:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:46,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:04:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:47,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942004420] [2023-12-20 15:04:47,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942004420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:47,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:47,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:04:47,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014620721] [2023-12-20 15:04:47,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:47,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:04:47,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:47,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:04:47,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:04:47,272 INFO L87 Difference]: Start difference. First operand 2504 states and 3680 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:47,947 INFO L93 Difference]: Finished difference Result 5324 states and 7889 transitions. [2023-12-20 15:04:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:04:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2023-12-20 15:04:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:47,954 INFO L225 Difference]: With dead ends: 5324 [2023-12-20 15:04:47,954 INFO L226 Difference]: Without dead ends: 2473 [2023-12-20 15:04:47,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:04:47,957 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 330 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:47,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 44 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:04:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2023-12-20 15:04:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2473. [2023-12-20 15:04:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 1.3491100323624596) internal successors, (3335), 2472 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3335 transitions. [2023-12-20 15:04:47,981 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3335 transitions. Word has length 207 [2023-12-20 15:04:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:47,982 INFO L495 AbstractCegarLoop]: Abstraction has 2473 states and 3335 transitions. [2023-12-20 15:04:47,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3335 transitions. [2023-12-20 15:04:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-20 15:04:47,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:47,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:47,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 15:04:47,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:47,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1999611277, now seen corresponding path program 1 times [2023-12-20 15:04:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931763876] [2023-12-20 15:04:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:04:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931763876] [2023-12-20 15:04:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931763876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472944220] [2023-12-20 15:04:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:48,235 INFO L87 Difference]: Start difference. First operand 2473 states and 3335 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:48,750 INFO L93 Difference]: Finished difference Result 7382 states and 9959 transitions. [2023-12-20 15:04:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2023-12-20 15:04:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:48,761 INFO L225 Difference]: With dead ends: 7382 [2023-12-20 15:04:48,761 INFO L226 Difference]: Without dead ends: 4910 [2023-12-20 15:04:48,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:48,767 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 208 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:48,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 117 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:04:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2023-12-20 15:04:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4097. [2023-12-20 15:04:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 1.247314453125) internal successors, (5109), 4096 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 5109 transitions. [2023-12-20 15:04:48,822 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 5109 transitions. Word has length 209 [2023-12-20 15:04:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:48,823 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 5109 transitions. [2023-12-20 15:04:48,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 5109 transitions. [2023-12-20 15:04:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-20 15:04:48,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:48,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 15:04:48,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:48,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash 468335256, now seen corresponding path program 1 times [2023-12-20 15:04:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:48,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103391284] [2023-12-20 15:04:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:48,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:48,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103391284] [2023-12-20 15:04:48,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103391284] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:48,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:48,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13426852] [2023-12-20 15:04:48,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:48,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:48,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:48,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:48,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:48,990 INFO L87 Difference]: Start difference. First operand 4097 states and 5109 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:49,563 INFO L93 Difference]: Finished difference Result 10652 states and 13296 transitions. [2023-12-20 15:04:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2023-12-20 15:04:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:49,579 INFO L225 Difference]: With dead ends: 10652 [2023-12-20 15:04:49,579 INFO L226 Difference]: Without dead ends: 6556 [2023-12-20 15:04:49,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:49,584 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 203 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:49,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 66 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:04:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2023-12-20 15:04:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6553. [2023-12-20 15:04:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6553 states, 6552 states have (on average 1.2455738705738706) internal successors, (8161), 6552 states have internal predecessors, (8161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6553 states to 6553 states and 8161 transitions. [2023-12-20 15:04:49,662 INFO L78 Accepts]: Start accepts. Automaton has 6553 states and 8161 transitions. Word has length 220 [2023-12-20 15:04:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:49,662 INFO L495 AbstractCegarLoop]: Abstraction has 6553 states and 8161 transitions. [2023-12-20 15:04:49,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6553 states and 8161 transitions. [2023-12-20 15:04:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-12-20 15:04:49,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:49,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:49,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 15:04:49,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:49,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash -394343191, now seen corresponding path program 1 times [2023-12-20 15:04:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:49,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525423329] [2023-12-20 15:04:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525423329] [2023-12-20 15:04:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525423329] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:50,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:50,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:04:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472138208] [2023-12-20 15:04:50,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:50,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:04:50,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:04:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:04:50,135 INFO L87 Difference]: Start difference. First operand 6553 states and 8161 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:51,001 INFO L93 Difference]: Finished difference Result 17066 states and 21122 transitions. [2023-12-20 15:04:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:04:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2023-12-20 15:04:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:51,022 INFO L225 Difference]: With dead ends: 17066 [2023-12-20 15:04:51,023 INFO L226 Difference]: Without dead ends: 9818 [2023-12-20 15:04:51,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:04:51,029 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 198 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:51,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 78 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:04:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9818 states. [2023-12-20 15:04:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9818 to 9817. [2023-12-20 15:04:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9817 states, 9816 states have (on average 1.2276894865525672) internal successors, (12051), 9816 states have internal predecessors, (12051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9817 states to 9817 states and 12051 transitions. [2023-12-20 15:04:51,151 INFO L78 Accepts]: Start accepts. Automaton has 9817 states and 12051 transitions. Word has length 223 [2023-12-20 15:04:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:51,152 INFO L495 AbstractCegarLoop]: Abstraction has 9817 states and 12051 transitions. [2023-12-20 15:04:51,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9817 states and 12051 transitions. [2023-12-20 15:04:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-20 15:04:51,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:51,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:51,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 15:04:51,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:51,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash 349578727, now seen corresponding path program 1 times [2023-12-20 15:04:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:51,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584009775] [2023-12-20 15:04:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:51,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584009775] [2023-12-20 15:04:51,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584009775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:51,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711393828] [2023-12-20 15:04:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:51,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:51,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:51,469 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 15:04:51,474 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 15:04:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:51,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:04:51,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 15:04:51,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:51,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711393828] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:51,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:51,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 15:04:51,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045571343] [2023-12-20 15:04:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:51,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:51,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:51,834 INFO L87 Difference]: Start difference. First operand 9817 states and 12051 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:52,463 INFO L93 Difference]: Finished difference Result 29409 states and 36109 transitions. [2023-12-20 15:04:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2023-12-20 15:04:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:52,497 INFO L225 Difference]: With dead ends: 29409 [2023-12-20 15:04:52,497 INFO L226 Difference]: Without dead ends: 19593 [2023-12-20 15:04:52,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:52,509 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:52,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 128 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:04:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19593 states. [2023-12-20 15:04:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19593 to 19591. [2023-12-20 15:04:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19591 states, 19590 states have (on average 1.2013782542113323) internal successors, (23535), 19590 states have internal predecessors, (23535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19591 states to 19591 states and 23535 transitions. [2023-12-20 15:04:52,827 INFO L78 Accepts]: Start accepts. Automaton has 19591 states and 23535 transitions. Word has length 227 [2023-12-20 15:04:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:52,827 INFO L495 AbstractCegarLoop]: Abstraction has 19591 states and 23535 transitions. [2023-12-20 15:04:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19591 states and 23535 transitions. [2023-12-20 15:04:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-12-20 15:04:52,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:52,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:52,861 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 15:04:53,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 15:04:53,048 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:53,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash 782953274, now seen corresponding path program 1 times [2023-12-20 15:04:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:53,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27372939] [2023-12-20 15:04:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:53,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27372939] [2023-12-20 15:04:53,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27372939] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910051600] [2023-12-20 15:04:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:53,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:53,386 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 15:04:53,436 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 15:04:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:53,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:04:53,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 15:04:53,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910051600] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:53,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:04:53,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024284047] [2023-12-20 15:04:53,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:53,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:53,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:53,769 INFO L87 Difference]: Start difference. First operand 19591 states and 23535 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:54,418 INFO L93 Difference]: Finished difference Result 39190 states and 47085 transitions. [2023-12-20 15:04:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2023-12-20 15:04:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:54,452 INFO L225 Difference]: With dead ends: 39190 [2023-12-20 15:04:54,452 INFO L226 Difference]: Without dead ends: 19600 [2023-12-20 15:04:54,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:54,470 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:54,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 321 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:04:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19600 states. [2023-12-20 15:04:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19600 to 19591. [2023-12-20 15:04:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19591 states, 19590 states have (on average 1.1948443083205718) internal successors, (23407), 19590 states have internal predecessors, (23407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19591 states to 19591 states and 23407 transitions. [2023-12-20 15:04:54,810 INFO L78 Accepts]: Start accepts. Automaton has 19591 states and 23407 transitions. Word has length 230 [2023-12-20 15:04:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:54,811 INFO L495 AbstractCegarLoop]: Abstraction has 19591 states and 23407 transitions. [2023-12-20 15:04:54,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 19591 states and 23407 transitions. [2023-12-20 15:04:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-12-20 15:04:54,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:54,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:54,842 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 15:04:55,040 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,SelfDestructingSolverStorable10 [2023-12-20 15:04:55,040 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:55,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1538701920, now seen corresponding path program 1 times [2023-12-20 15:04:55,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:55,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550555207] [2023-12-20 15:04:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:55,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 15:04:55,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550555207] [2023-12-20 15:04:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550555207] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027817285] [2023-12-20 15:04:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:55,346 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 15:04:55,396 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 15:04:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:55,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:04:55,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:04:55,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027817285] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:55,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:55,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:04:55,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222984822] [2023-12-20 15:04:55,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:55,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:55,544 INFO L87 Difference]: Start difference. First operand 19591 states and 23407 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:56,061 INFO L93 Difference]: Finished difference Result 39187 states and 46823 transitions. [2023-12-20 15:04:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2023-12-20 15:04:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:56,089 INFO L225 Difference]: With dead ends: 39187 [2023-12-20 15:04:56,089 INFO L226 Difference]: Without dead ends: 19597 [2023-12-20 15:04:56,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:56,106 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 188 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:56,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 339 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:04:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2023-12-20 15:04:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 19591. [2023-12-20 15:04:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19591 states, 19590 states have (on average 1.1253700867789689) internal successors, (22046), 19590 states have internal predecessors, (22046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19591 states to 19591 states and 22046 transitions. [2023-12-20 15:04:56,358 INFO L78 Accepts]: Start accepts. Automaton has 19591 states and 22046 transitions. Word has length 258 [2023-12-20 15:04:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:56,358 INFO L495 AbstractCegarLoop]: Abstraction has 19591 states and 22046 transitions. [2023-12-20 15:04:56,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 19591 states and 22046 transitions. [2023-12-20 15:04:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-12-20 15:04:56,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:56,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:56,381 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 15:04:56,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:56,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:56,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash 525381652, now seen corresponding path program 2 times [2023-12-20 15:04:56,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:56,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173457177] [2023-12-20 15:04:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:56,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 15:04:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:56,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173457177] [2023-12-20 15:04:56,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173457177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:56,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935718607] [2023-12-20 15:04:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 15:04:56,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:56,806 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 15:04:56,815 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 15:04:57,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 15:04:57,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 15:04:57,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:04:57,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:04:57,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935718607] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:57,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:57,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:04:57,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112413372] [2023-12-20 15:04:57,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:57,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:57,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:57,070 INFO L87 Difference]: Start difference. First operand 19591 states and 22046 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:57,537 INFO L93 Difference]: Finished difference Result 38973 states and 43805 transitions. [2023-12-20 15:04:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2023-12-20 15:04:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:57,558 INFO L225 Difference]: With dead ends: 38973 [2023-12-20 15:04:57,558 INFO L226 Difference]: Without dead ends: 19383 [2023-12-20 15:04:57,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:57,572 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 211 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:57,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 299 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 15:04:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19383 states. [2023-12-20 15:04:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19383 to 19377. [2023-12-20 15:04:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 19376 states have (on average 1.094498348472337) internal successors, (21207), 19376 states have internal predecessors, (21207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 21207 transitions. [2023-12-20 15:04:57,796 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 21207 transitions. Word has length 258 [2023-12-20 15:04:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:57,796 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 21207 transitions. [2023-12-20 15:04:57,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 21207 transitions. [2023-12-20 15:04:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-12-20 15:04:57,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:57,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:57,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 15:04:58,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:58,020 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:58,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1632467037, now seen corresponding path program 1 times [2023-12-20 15:04:58,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:58,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634525285] [2023-12-20 15:04:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 15:04:58,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634525285] [2023-12-20 15:04:58,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634525285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115432726] [2023-12-20 15:04:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:58,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:04:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 15:04:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:58,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:04:58,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-20 15:04:58,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:58,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115432726] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:58,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:58,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:04:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685604255] [2023-12-20 15:04:58,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:58,582 INFO L87 Difference]: Start difference. First operand 19377 states and 21207 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:59,135 INFO L93 Difference]: Finished difference Result 54016 states and 59130 transitions. [2023-12-20 15:04:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2023-12-20 15:04:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:59,166 INFO L225 Difference]: With dead ends: 54016 [2023-12-20 15:04:59,166 INFO L226 Difference]: Without dead ends: 34640 [2023-12-20 15:04:59,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:59,181 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:59,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:04:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34640 states. [2023-12-20 15:04:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34640 to 26080. [2023-12-20 15:04:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26080 states, 26079 states have (on average 1.098700103531577) internal successors, (28653), 26079 states have internal predecessors, (28653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26080 states to 26080 states and 28653 transitions. [2023-12-20 15:04:59,624 INFO L78 Accepts]: Start accepts. Automaton has 26080 states and 28653 transitions. Word has length 264 [2023-12-20 15:04:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:59,624 INFO L495 AbstractCegarLoop]: Abstraction has 26080 states and 28653 transitions. [2023-12-20 15:04:59,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 26080 states and 28653 transitions. [2023-12-20 15:04:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-12-20 15:04:59,640 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:59,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:59,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 15:04:59,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 15:04:59,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:59,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash -166199581, now seen corresponding path program 1 times [2023-12-20 15:04:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339942484] [2023-12-20 15:04:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:59,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:59,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339942484] [2023-12-20 15:04:59,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339942484] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:59,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:59,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:04:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304591007] [2023-12-20 15:04:59,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:59,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:59,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:59,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:59,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:59,985 INFO L87 Difference]: Start difference. First operand 26080 states and 28653 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:00,522 INFO L93 Difference]: Finished difference Result 50310 states and 55283 transitions. [2023-12-20 15:05:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:00,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2023-12-20 15:05:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:00,545 INFO L225 Difference]: With dead ends: 50310 [2023-12-20 15:05:00,545 INFO L226 Difference]: Without dead ends: 24231 [2023-12-20 15:05:00,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:00,589 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 210 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:00,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 312 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:05:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24231 states. [2023-12-20 15:05:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24231 to 23619. [2023-12-20 15:05:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23619 states, 23618 states have (on average 1.079557964264544) internal successors, (25497), 23618 states have internal predecessors, (25497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23619 states to 23619 states and 25497 transitions. [2023-12-20 15:05:01,030 INFO L78 Accepts]: Start accepts. Automaton has 23619 states and 25497 transitions. Word has length 321 [2023-12-20 15:05:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:01,030 INFO L495 AbstractCegarLoop]: Abstraction has 23619 states and 25497 transitions. [2023-12-20 15:05:01,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 23619 states and 25497 transitions. [2023-12-20 15:05:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-12-20 15:05:01,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:01,048 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:01,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 15:05:01,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:01,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1772255890, now seen corresponding path program 1 times [2023-12-20 15:05:01,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:01,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632550018] [2023-12-20 15:05:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:01,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 15:05:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:01,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632550018] [2023-12-20 15:05:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632550018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:01,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:01,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696164743] [2023-12-20 15:05:01,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:01,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:01,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:01,437 INFO L87 Difference]: Start difference. First operand 23619 states and 25497 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:02,306 INFO L93 Difference]: Finished difference Result 58426 states and 63067 transitions. [2023-12-20 15:05:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2023-12-20 15:05:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:02,337 INFO L225 Difference]: With dead ends: 58426 [2023-12-20 15:05:02,337 INFO L226 Difference]: Without dead ends: 34808 [2023-12-20 15:05:02,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:02,353 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 341 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:02,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 120 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:05:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34808 states. [2023-12-20 15:05:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34808 to 34193. [2023-12-20 15:05:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34193 states, 34192 states have (on average 1.0688465138043988) internal successors, (36546), 34192 states have internal predecessors, (36546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34193 states to 34193 states and 36546 transitions. [2023-12-20 15:05:02,816 INFO L78 Accepts]: Start accepts. Automaton has 34193 states and 36546 transitions. Word has length 333 [2023-12-20 15:05:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:02,817 INFO L495 AbstractCegarLoop]: Abstraction has 34193 states and 36546 transitions. [2023-12-20 15:05:02,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 34193 states and 36546 transitions. [2023-12-20 15:05:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-12-20 15:05:02,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:02,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 15:05:02,849 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:02,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1755304509, now seen corresponding path program 1 times [2023-12-20 15:05:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341453077] [2023-12-20 15:05:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-20 15:05:03,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341453077] [2023-12-20 15:05:03,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341453077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780690405] [2023-12-20 15:05:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:03,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:03,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:03,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:05:03,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 15:05:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:03,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:05:03,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:05:03,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 15:05:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:05:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780690405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 15:05:03,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 15:05:03,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-12-20 15:05:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443511964] [2023-12-20 15:05:03,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 15:05:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 15:05:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 15:05:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:05:03,574 INFO L87 Difference]: Start difference. First operand 34193 states and 36546 transitions. Second operand has 6 states, 6 states have (on average 62.0) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:05,175 INFO L93 Difference]: Finished difference Result 106846 states and 114555 transitions. [2023-12-20 15:05:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 15:05:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 62.0) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2023-12-20 15:05:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:05,249 INFO L225 Difference]: With dead ends: 106846 [2023-12-20 15:05:05,250 INFO L226 Difference]: Without dead ends: 72654 [2023-12-20 15:05:05,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-20 15:05:05,279 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2098 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:05,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 153 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 15:05:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72654 states. [2023-12-20 15:05:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72654 to 72228. [2023-12-20 15:05:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72228 states, 72227 states have (on average 1.0705830229692497) internal successors, (77325), 72227 states have internal predecessors, (77325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72228 states to 72228 states and 77325 transitions. [2023-12-20 15:05:06,333 INFO L78 Accepts]: Start accepts. Automaton has 72228 states and 77325 transitions. Word has length 338 [2023-12-20 15:05:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:06,333 INFO L495 AbstractCegarLoop]: Abstraction has 72228 states and 77325 transitions. [2023-12-20 15:05:06,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.0) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 72228 states and 77325 transitions. [2023-12-20 15:05:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-12-20 15:05:06,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:06,368 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:06,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:06,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-20 15:05:06,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:06,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash 8217942, now seen corresponding path program 1 times [2023-12-20 15:05:06,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:06,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684080500] [2023-12-20 15:05:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:06,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-20 15:05:06,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:06,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684080500] [2023-12-20 15:05:06,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684080500] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:06,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:06,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:05:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779055283] [2023-12-20 15:05:06,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:06,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:06,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:06,901 INFO L87 Difference]: Start difference. First operand 72228 states and 77325 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:07,591 INFO L93 Difference]: Finished difference Result 215052 states and 230283 transitions. [2023-12-20 15:05:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2023-12-20 15:05:07,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:07,909 INFO L225 Difference]: With dead ends: 215052 [2023-12-20 15:05:07,910 INFO L226 Difference]: Without dead ends: 142825 [2023-12-20 15:05:07,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:07,932 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:07,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:05:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142825 states. [2023-12-20 15:05:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142825 to 142819. [2023-12-20 15:05:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142819 states, 142818 states have (on average 1.070698371353751) internal successors, (152915), 142818 states have internal predecessors, (152915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142819 states to 142819 states and 152915 transitions. [2023-12-20 15:05:09,940 INFO L78 Accepts]: Start accepts. Automaton has 142819 states and 152915 transitions. Word has length 423 [2023-12-20 15:05:09,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:09,942 INFO L495 AbstractCegarLoop]: Abstraction has 142819 states and 152915 transitions. [2023-12-20 15:05:09,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 142819 states and 152915 transitions. [2023-12-20 15:05:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-12-20 15:05:09,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:09,994 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:09,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 15:05:09,994 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:09,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:09,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1134183281, now seen corresponding path program 1 times [2023-12-20 15:05:09,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:09,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735883822] [2023-12-20 15:05:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:09,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-20 15:05:10,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:10,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735883822] [2023-12-20 15:05:10,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735883822] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:10,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:10,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609611724] [2023-12-20 15:05:10,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:10,477 INFO L87 Difference]: Start difference. First operand 142819 states and 152915 transitions. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:12,121 INFO L93 Difference]: Finished difference Result 419099 states and 448935 transitions. [2023-12-20 15:05:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2023-12-20 15:05:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:12,652 INFO L225 Difference]: With dead ends: 419099 [2023-12-20 15:05:12,653 INFO L226 Difference]: Without dead ends: 276281 [2023-12-20 15:05:12,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:12,728 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 596 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:12,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 43 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:05:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276281 states. [2023-12-20 15:05:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276281 to 276275. [2023-12-20 15:05:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276275 states, 276274 states have (on average 1.0707956593816284) internal successors, (295833), 276274 states have internal predecessors, (295833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276275 states to 276275 states and 295833 transitions. [2023-12-20 15:05:16,699 INFO L78 Accepts]: Start accepts. Automaton has 276275 states and 295833 transitions. Word has length 425 [2023-12-20 15:05:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:16,700 INFO L495 AbstractCegarLoop]: Abstraction has 276275 states and 295833 transitions. [2023-12-20 15:05:16,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 276275 states and 295833 transitions. [2023-12-20 15:05:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-20 15:05:16,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:16,734 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 15:05:16,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:16,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1913697779, now seen corresponding path program 1 times [2023-12-20 15:05:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555775296] [2023-12-20 15:05:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-12-20 15:05:17,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555775296] [2023-12-20 15:05:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555775296] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710050973] [2023-12-20 15:05:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:17,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:17,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:05:17,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 15:05:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:17,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:05:17,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-12-20 15:05:17,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710050973] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:17,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:17,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 15:05:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924037407] [2023-12-20 15:05:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:05:17,683 INFO L87 Difference]: Start difference. First operand 276275 states and 295833 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:20,198 INFO L93 Difference]: Finished difference Result 708636 states and 762149 transitions. [2023-12-20 15:05:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2023-12-20 15:05:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:20,846 INFO L225 Difference]: With dead ends: 708636 [2023-12-20 15:05:20,846 INFO L226 Difference]: Without dead ends: 432362 [2023-12-20 15:05:20,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:05:20,947 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 145 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:20,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 92 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:05:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432362 states. [2023-12-20 15:05:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432362 to 426419. [2023-12-20 15:05:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426419 states, 426418 states have (on average 1.0695983753031064) internal successors, (456096), 426418 states have internal predecessors, (456096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426419 states to 426419 states and 456096 transitions. [2023-12-20 15:05:27,707 INFO L78 Accepts]: Start accepts. Automaton has 426419 states and 456096 transitions. Word has length 443 [2023-12-20 15:05:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:27,709 INFO L495 AbstractCegarLoop]: Abstraction has 426419 states and 456096 transitions. [2023-12-20 15:05:27,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 426419 states and 456096 transitions. [2023-12-20 15:05:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-12-20 15:05:27,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:27,767 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:27,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:27,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:27,973 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:27,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash -476345776, now seen corresponding path program 1 times [2023-12-20 15:05:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190892086] [2023-12-20 15:05:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 275 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 15:05:28,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190892086] [2023-12-20 15:05:28,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190892086] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895179320] [2023-12-20 15:05:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:28,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:28,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:05:28,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 15:05:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:28,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:05:28,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-20 15:05:28,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:28,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895179320] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:28,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:28,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:05:28,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882653517] [2023-12-20 15:05:28,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:28,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:05:28,800 INFO L87 Difference]: Start difference. First operand 426419 states and 456096 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:31,917 INFO L93 Difference]: Finished difference Result 861602 states and 921543 transitions. [2023-12-20 15:05:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:31,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 446 [2023-12-20 15:05:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:32,980 INFO L225 Difference]: With dead ends: 861602 [2023-12-20 15:05:32,980 INFO L226 Difference]: Without dead ends: 435184 [2023-12-20 15:05:33,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:05:33,328 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 210 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:33,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 345 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:05:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435184 states. [2023-12-20 15:05:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435184 to 434517. [2023-12-20 15:05:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434517 states, 434516 states have (on average 1.0680366200554179) internal successors, (464079), 434516 states have internal predecessors, (464079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434517 states to 434517 states and 464079 transitions. [2023-12-20 15:05:39,951 INFO L78 Accepts]: Start accepts. Automaton has 434517 states and 464079 transitions. Word has length 446 [2023-12-20 15:05:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:39,951 INFO L495 AbstractCegarLoop]: Abstraction has 434517 states and 464079 transitions. [2023-12-20 15:05:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 434517 states and 464079 transitions. [2023-12-20 15:05:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-20 15:05:40,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:40,012 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:40,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:40,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-20 15:05:40,218 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:40,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1297806169, now seen corresponding path program 1 times [2023-12-20 15:05:40,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:40,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033186437] [2023-12-20 15:05:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:40,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-20 15:05:40,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:40,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033186437] [2023-12-20 15:05:40,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033186437] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:40,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:40,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:40,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990093050] [2023-12-20 15:05:40,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:40,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:40,749 INFO L87 Difference]: Start difference. First operand 434517 states and 464079 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:43,056 INFO L93 Difference]: Finished difference Result 666725 states and 710804 transitions. [2023-12-20 15:05:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 476 [2023-12-20 15:05:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:43,291 INFO L225 Difference]: With dead ends: 666725 [2023-12-20 15:05:43,291 INFO L226 Difference]: Without dead ends: 175158 [2023-12-20 15:05:43,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:43,359 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 188 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:43,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 308 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:05:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175158 states. [2023-12-20 15:05:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175158 to 102036. [2023-12-20 15:05:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102036 states, 102035 states have (on average 1.0605968540206792) internal successors, (108218), 102035 states have internal predecessors, (108218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102036 states to 102036 states and 108218 transitions. [2023-12-20 15:05:45,293 INFO L78 Accepts]: Start accepts. Automaton has 102036 states and 108218 transitions. Word has length 476 [2023-12-20 15:05:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 102036 states and 108218 transitions. [2023-12-20 15:05:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 102036 states and 108218 transitions. [2023-12-20 15:05:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-12-20 15:05:45,311 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:45,312 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:45,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-20 15:05:45,312 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:45,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1154549565, now seen corresponding path program 1 times [2023-12-20 15:05:45,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:45,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528280401] [2023-12-20 15:05:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:45,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 427 proven. 143 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-20 15:05:46,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528280401] [2023-12-20 15:05:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528280401] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603528541] [2023-12-20 15:05:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:46,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:46,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:46,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:05:46,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 15:05:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:47,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:05:47,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-20 15:05:47,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:47,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603528541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:47,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-12-20 15:05:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385204346] [2023-12-20 15:05:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:47,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:47,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:47,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-20 15:05:47,336 INFO L87 Difference]: Start difference. First operand 102036 states and 108218 transitions. Second operand has 4 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:48,450 INFO L93 Difference]: Finished difference Result 205971 states and 218547 transitions. [2023-12-20 15:05:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:48,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 482 [2023-12-20 15:05:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:48,570 INFO L225 Difference]: With dead ends: 205971 [2023-12-20 15:05:48,570 INFO L226 Difference]: Without dead ends: 103936 [2023-12-20 15:05:48,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-20 15:05:48,627 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 531 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:48,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 102 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:05:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103936 states. [2023-12-20 15:05:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103936 to 62708. [2023-12-20 15:05:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62708 states, 62707 states have (on average 1.0514456121326168) internal successors, (65933), 62707 states have internal predecessors, (65933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62708 states to 62708 states and 65933 transitions. [2023-12-20 15:05:49,760 INFO L78 Accepts]: Start accepts. Automaton has 62708 states and 65933 transitions. Word has length 482 [2023-12-20 15:05:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 62708 states and 65933 transitions. [2023-12-20 15:05:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 62708 states and 65933 transitions. [2023-12-20 15:05:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-12-20 15:05:49,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:49,775 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:49,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:49,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:49,982 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:49,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1369464037, now seen corresponding path program 1 times [2023-12-20 15:05:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384141891] [2023-12-20 15:05:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 411 proven. 133 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-20 15:05:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384141891] [2023-12-20 15:05:51,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384141891] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535968703] [2023-12-20 15:05:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:51,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:51,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:05:51,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 15:05:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:51,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:05:51,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-20 15:05:51,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535968703] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:51,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:51,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-12-20 15:05:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275892132] [2023-12-20 15:05:51,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:51,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 15:05:51,920 INFO L87 Difference]: Start difference. First operand 62708 states and 65933 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:52,558 INFO L93 Difference]: Finished difference Result 129686 states and 136446 transitions. [2023-12-20 15:05:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:52,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 522 [2023-12-20 15:05:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:52,629 INFO L225 Difference]: With dead ends: 129686 [2023-12-20 15:05:52,629 INFO L226 Difference]: Without dead ends: 66979 [2023-12-20 15:05:52,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 15:05:52,663 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 253 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 257 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:05:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66979 states. [2023-12-20 15:05:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66979 to 60643. [2023-12-20 15:05:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60643 states, 60642 states have (on average 1.0495860954454008) internal successors, (63649), 60642 states have internal predecessors, (63649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60643 states to 60643 states and 63649 transitions. [2023-12-20 15:05:53,433 INFO L78 Accepts]: Start accepts. Automaton has 60643 states and 63649 transitions. Word has length 522 [2023-12-20 15:05:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:53,434 INFO L495 AbstractCegarLoop]: Abstraction has 60643 states and 63649 transitions. [2023-12-20 15:05:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60643 states and 63649 transitions. [2023-12-20 15:05:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-12-20 15:05:53,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:53,613 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:53,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:53,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-20 15:05:53,819 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:53,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1603856827, now seen corresponding path program 1 times [2023-12-20 15:05:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:53,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604834400] [2023-12-20 15:05:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 600 proven. 18 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-20 15:05:54,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:54,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604834400] [2023-12-20 15:05:54,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604834400] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:54,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533388101] [2023-12-20 15:05:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:54,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:54,585 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:05:54,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 15:05:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:54,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:05:54,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 606 proven. 67 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-20 15:05:55,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 15:05:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 606 proven. 67 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-20 15:05:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533388101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 15:05:55,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 15:05:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-12-20 15:05:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349712530] [2023-12-20 15:05:55,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 15:05:55,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 15:05:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 15:05:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-20 15:05:55,352 INFO L87 Difference]: Start difference. First operand 60643 states and 63649 transitions. Second operand has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:58,304 INFO L93 Difference]: Finished difference Result 233788 states and 245014 transitions. [2023-12-20 15:05:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 15:05:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 547 [2023-12-20 15:05:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:58,505 INFO L225 Difference]: With dead ends: 233788 [2023-12-20 15:05:58,506 INFO L226 Difference]: Without dead ends: 173142 [2023-12-20 15:05:58,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-12-20 15:05:58,561 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2452 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 4140 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 4392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 4140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:58,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 423 Invalid, 4392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 4140 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-20 15:05:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173142 states. [2023-12-20 15:06:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173142 to 68973. [2023-12-20 15:06:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68973 states, 68972 states have (on average 1.0477875079742505) internal successors, (72268), 68972 states have internal predecessors, (72268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68973 states to 68973 states and 72268 transitions. [2023-12-20 15:06:00,193 INFO L78 Accepts]: Start accepts. Automaton has 68973 states and 72268 transitions. Word has length 547 [2023-12-20 15:06:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:00,208 INFO L495 AbstractCegarLoop]: Abstraction has 68973 states and 72268 transitions. [2023-12-20 15:06:00,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 68973 states and 72268 transitions. [2023-12-20 15:06:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2023-12-20 15:06:00,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:00,221 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:00,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:00,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-20 15:06:00,441 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:00,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash -59562947, now seen corresponding path program 1 times [2023-12-20 15:06:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:00,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614681192] [2023-12-20 15:06:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 602 proven. 143 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-12-20 15:06:02,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614681192] [2023-12-20 15:06:02,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614681192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174639192] [2023-12-20 15:06:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:02,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:06:02,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 15:06:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:02,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:06:02,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 649 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2023-12-20 15:06:02,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:02,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174639192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:02,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:02,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-12-20 15:06:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265021934] [2023-12-20 15:06:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:02,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:06:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:06:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-20 15:06:02,479 INFO L87 Difference]: Start difference. First operand 68973 states and 72268 transitions. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:03,368 INFO L93 Difference]: Finished difference Result 181668 states and 190234 transitions. [2023-12-20 15:06:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:06:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 548 [2023-12-20 15:06:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:03,496 INFO L225 Difference]: With dead ends: 181668 [2023-12-20 15:06:03,497 INFO L226 Difference]: Without dead ends: 109042 [2023-12-20 15:06:03,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-20 15:06:03,547 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 494 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:03,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 297 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:06:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109042 states. [2023-12-20 15:06:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109042 to 103955. [2023-12-20 15:06:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103955 states, 103954 states have (on average 1.0484156453816111) internal successors, (108987), 103954 states have internal predecessors, (108987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103955 states to 103955 states and 108987 transitions. [2023-12-20 15:06:04,831 INFO L78 Accepts]: Start accepts. Automaton has 103955 states and 108987 transitions. Word has length 548 [2023-12-20 15:06:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:04,832 INFO L495 AbstractCegarLoop]: Abstraction has 103955 states and 108987 transitions. [2023-12-20 15:06:04,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 103955 states and 108987 transitions. [2023-12-20 15:06:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-12-20 15:06:04,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:04,849 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:04,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 15:06:05,055 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:05,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash 989663461, now seen corresponding path program 1 times [2023-12-20 15:06:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532023323] [2023-12-20 15:06:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 588 proven. 147 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-20 15:06:05,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532023323] [2023-12-20 15:06:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532023323] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202006009] [2023-12-20 15:06:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:05,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:05,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:06:05,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 15:06:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:06,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:06:06,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 643 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-20 15:06:06,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:06,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202006009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:06,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:06,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:06:06,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714376950] [2023-12-20 15:06:06,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:06,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:06:06,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:06,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:06:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:06:06,600 INFO L87 Difference]: Start difference. First operand 103955 states and 108987 transitions. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:07,788 INFO L93 Difference]: Finished difference Result 262544 states and 275086 transitions. [2023-12-20 15:06:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:06:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 580 [2023-12-20 15:06:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:07,977 INFO L225 Difference]: With dead ends: 262544 [2023-12-20 15:06:07,977 INFO L226 Difference]: Without dead ends: 158793 [2023-12-20 15:06:08,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:06:08,051 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 301 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:08,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 492 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:06:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158793 states.