/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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 15:09:42,157 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 15:09:42,225 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 15:09:42,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 15:09:42,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 15:09:42,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 15:09:42,252 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 15:09:42,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 15:09:42,253 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 15:09:42,256 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 15:09:42,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 15:09:42,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 15:09:42,257 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 15:09:42,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 15:09:42,258 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 15:09:42,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 15:09:42,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 15:09:42,259 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 15:09:42,259 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 15:09:42,260 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 15:09:42,260 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 15:09:42,260 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 15:09:42,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 15:09:42,261 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 15:09:42,261 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 15:09:42,261 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 15:09:42,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 15:09:42,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 15:09:42,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 15:09:42,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 15:09:42,262 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 15:09:42,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 15:09:42,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 15:09:42,263 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 15:09:42,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 15:09:42,263 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 15:09:42,263 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 15:09:42,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 15:09:42,264 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 15:09:42,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 15:09:42,264 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 15:09:42,264 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 15:09:42,264 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 15:09:42,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 15:09:42,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 15:09:42,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 15:09:42,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 15:09:42,471 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 15:09:42,471 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 15:09:42,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2023-12-20 15:09:43,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 15:09:43,789 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 15:09:43,790 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2023-12-20 15:09:43,807 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5646527/5653a97039564d55bebc633ef1ee7e09/FLAG4abd7ff4b [2023-12-20 15:09:43,820 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5646527/5653a97039564d55bebc633ef1ee7e09 [2023-12-20 15:09:43,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 15:09:43,823 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 15:09:43,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 15:09:43,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 15:09:43,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 15:09:43,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 03:09:43" (1/1) ... [2023-12-20 15:09:43,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7611d064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:43, skipping insertion in model container [2023-12-20 15:09:43,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 03:09:43" (1/1) ... [2023-12-20 15:09:43,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 15:09:44,260 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_label34.c[59879,59892] [2023-12-20 15:09:44,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 15:09:44,296 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 15:09:44,468 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_label34.c[59879,59892] [2023-12-20 15:09:44,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 15:09:44,487 INFO L206 MainTranslator]: Completed translation [2023-12-20 15:09:44,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44 WrapperNode [2023-12-20 15:09:44,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 15:09:44,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 15:09:44,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 15:09:44,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 15:09:44,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,568 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-12-20 15:09:44,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 15:09:44,569 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 15:09:44,569 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 15:09:44,569 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 15:09:44,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,590 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,642 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 15:09:44,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,643 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,704 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 15:09:44,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 15:09:44,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 15:09:44,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 15:09:44,713 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (1/1) ... [2023-12-20 15:09:44,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 15:09:44,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:09:44,734 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 15:09:44,757 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 15:09:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 15:09:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 15:09:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 15:09:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 15:09:44,843 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 15:09:44,846 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 15:09:46,115 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 15:09:46,160 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 15:09:46,160 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-20 15:09:46,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 03:09:46 BoogieIcfgContainer [2023-12-20 15:09:46,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 15:09:46,162 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 15:09:46,162 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 15:09:46,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 15:09:46,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 03:09:43" (1/3) ... [2023-12-20 15:09:46,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483dfe55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 03:09:46, skipping insertion in model container [2023-12-20 15:09:46,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:09:44" (2/3) ... [2023-12-20 15:09:46,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483dfe55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 03:09:46, skipping insertion in model container [2023-12-20 15:09:46,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 03:09:46" (3/3) ... [2023-12-20 15:09:46,166 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2023-12-20 15:09:46,177 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 15:09:46,177 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 15:09:46,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 15:09:46,224 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;@7097c2e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 15:09:46,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 15:09:46,229 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 15:09:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-12-20 15:09:46,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:46,249 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] [2023-12-20 15:09:46,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:46,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1178120330, now seen corresponding path program 1 times [2023-12-20 15:09:46,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:46,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403251267] [2023-12-20 15:09:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:46,613 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 15:09:46,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:46,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403251267] [2023-12-20 15:09:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403251267] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:46,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:46,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:09:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270871612] [2023-12-20 15:09:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:46,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 15:09:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 15:09:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 15:09:46,647 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 94.5) internal successors, (189), 2 states have internal predecessors, (189), 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 15:09:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:46,689 INFO L93 Difference]: Finished difference Result 479 states and 913 transitions. [2023-12-20 15:09:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 15:09:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 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 189 [2023-12-20 15:09:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:46,697 INFO L225 Difference]: With dead ends: 479 [2023-12-20 15:09:46,698 INFO L226 Difference]: Without dead ends: 238 [2023-12-20 15:09:46,700 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 15:09:46,702 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 15:09:46,702 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 15:09:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-20 15:09:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-12-20 15:09:46,737 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 15:09:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 392 transitions. [2023-12-20 15:09:46,739 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 392 transitions. Word has length 189 [2023-12-20 15:09:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:46,740 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 392 transitions. [2023-12-20 15:09:46,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 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 15:09:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 392 transitions. [2023-12-20 15:09:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-12-20 15:09:46,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:46,743 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] [2023-12-20 15:09:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 15:09:46,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:46,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -752658120, now seen corresponding path program 1 times [2023-12-20 15:09:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346697911] [2023-12-20 15:09:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:47,185 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 15:09:47,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:47,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346697911] [2023-12-20 15:09:47,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346697911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:47,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:47,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:09:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824214369] [2023-12-20 15:09:47,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:47,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:47,193 INFO L87 Difference]: Start difference. First operand 238 states and 392 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 15:09:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:47,866 INFO L93 Difference]: Finished difference Result 698 states and 1151 transitions. [2023-12-20 15:09:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 189 [2023-12-20 15:09:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:47,872 INFO L225 Difference]: With dead ends: 698 [2023-12-20 15:09:47,872 INFO L226 Difference]: Without dead ends: 461 [2023-12-20 15:09:47,873 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 15:09:47,874 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:47,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 148 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:09:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-12-20 15:09:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2023-12-20 15:09:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.539301310043668) internal successors, (705), 458 states have internal predecessors, (705), 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 15:09:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 705 transitions. [2023-12-20 15:09:47,893 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 705 transitions. Word has length 189 [2023-12-20 15:09:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:47,893 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 705 transitions. [2023-12-20 15:09:47,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 15:09:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 705 transitions. [2023-12-20 15:09:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-20 15:09:47,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:47,896 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] [2023-12-20 15:09:47,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 15:09:47,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:47,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash 44504215, now seen corresponding path program 1 times [2023-12-20 15:09:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:47,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004144462] [2023-12-20 15:09:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:48,037 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 15:09:48,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004144462] [2023-12-20 15:09:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004144462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:48,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:48,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:09:48,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2256531] [2023-12-20 15:09:48,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:48,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:48,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:48,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:48,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:48,039 INFO L87 Difference]: Start difference. First operand 459 states and 705 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 15:09:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:48,663 INFO L93 Difference]: Finished difference Result 1343 states and 2078 transitions. [2023-12-20 15:09:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:48,664 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 15:09:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:48,667 INFO L225 Difference]: With dead ends: 1343 [2023-12-20 15:09:48,667 INFO L226 Difference]: Without dead ends: 885 [2023-12-20 15:09:48,669 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 15:09:48,670 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 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 15:09:48,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:09:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2023-12-20 15:09:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 869. [2023-12-20 15:09:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.512672811059908) internal successors, (1313), 868 states have internal predecessors, (1313), 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 15:09:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1313 transitions. [2023-12-20 15:09:48,708 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1313 transitions. Word has length 197 [2023-12-20 15:09:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:48,709 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1313 transitions. [2023-12-20 15:09:48,709 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 15:09:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1313 transitions. [2023-12-20 15:09:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-20 15:09:48,711 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:48,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 15:09:48,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 15:09:48,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:48,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 925949310, now seen corresponding path program 1 times [2023-12-20 15:09:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557902657] [2023-12-20 15:09:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:48,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:09:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557902657] [2023-12-20 15:09:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557902657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:48,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:48,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:09:48,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078153204] [2023-12-20 15:09:48,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:48,915 INFO L87 Difference]: Start difference. First operand 869 states and 1313 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 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 15:09:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:49,496 INFO L93 Difference]: Finished difference Result 2553 states and 3868 transitions. [2023-12-20 15:09:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 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 15:09:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:49,501 INFO L225 Difference]: With dead ends: 2553 [2023-12-20 15:09:49,501 INFO L226 Difference]: Without dead ends: 1685 [2023-12-20 15:09:49,502 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 15:09:49,503 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 232 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:49,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 414 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:09:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2023-12-20 15:09:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1683. [2023-12-20 15:09:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 1.3365041617122473) internal successors, (2248), 1682 states have internal predecessors, (2248), 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 15:09:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2248 transitions. [2023-12-20 15:09:49,526 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2248 transitions. Word has length 209 [2023-12-20 15:09:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 2248 transitions. [2023-12-20 15:09:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 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 15:09:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2248 transitions. [2023-12-20 15:09:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-12-20 15:09:49,530 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:49,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:09:49,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 15:09:49,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:49,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1355238945, now seen corresponding path program 1 times [2023-12-20 15:09:49,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:49,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484143261] [2023-12-20 15:09:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:49,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:09:49,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:49,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484143261] [2023-12-20 15:09:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484143261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:09:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386275612] [2023-12-20 15:09:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:49,779 INFO L87 Difference]: Start difference. First operand 1683 states and 2248 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 15:09:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:50,361 INFO L93 Difference]: Finished difference Result 5016 states and 6706 transitions. [2023-12-20 15:09:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 212 [2023-12-20 15:09:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:50,369 INFO L225 Difference]: With dead ends: 5016 [2023-12-20 15:09:50,369 INFO L226 Difference]: Without dead ends: 3334 [2023-12-20 15:09:50,370 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 15:09:50,371 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:50,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 121 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:09:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2023-12-20 15:09:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3325. [2023-12-20 15:09:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3324 states have (on average 1.3231046931407942) internal successors, (4398), 3324 states have internal predecessors, (4398), 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 15:09:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 4398 transitions. [2023-12-20 15:09:50,410 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 4398 transitions. Word has length 212 [2023-12-20 15:09:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:50,411 INFO L495 AbstractCegarLoop]: Abstraction has 3325 states and 4398 transitions. [2023-12-20 15:09:50,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 15:09:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 4398 transitions. [2023-12-20 15:09:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-12-20 15:09:50,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:50,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:09:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 15:09:50,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:50,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1288735549, now seen corresponding path program 1 times [2023-12-20 15:09:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817545986] [2023-12-20 15:09:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:09:50,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817545986] [2023-12-20 15:09:50,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817545986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:50,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:50,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:09:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226494694] [2023-12-20 15:09:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:50,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:50,565 INFO L87 Difference]: Start difference. First operand 3325 states and 4398 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 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 15:09:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:51,162 INFO L93 Difference]: Finished difference Result 9927 states and 13144 transitions. [2023-12-20 15:09:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 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 215 [2023-12-20 15:09:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:51,181 INFO L225 Difference]: With dead ends: 9927 [2023-12-20 15:09:51,181 INFO L226 Difference]: Without dead ends: 6603 [2023-12-20 15:09:51,186 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 15:09:51,187 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 219 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:51,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 165 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:09:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2023-12-20 15:09:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 5767. [2023-12-20 15:09:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 1.3371488033298646) internal successors, (7710), 5766 states have internal predecessors, (7710), 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 15:09:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 7710 transitions. [2023-12-20 15:09:51,278 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 7710 transitions. Word has length 215 [2023-12-20 15:09:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:51,278 INFO L495 AbstractCegarLoop]: Abstraction has 5767 states and 7710 transitions. [2023-12-20 15:09:51,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 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 15:09:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 7710 transitions. [2023-12-20 15:09:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-20 15:09:51,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:51,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:09:51,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 15:09:51,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:51,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1207004714, now seen corresponding path program 1 times [2023-12-20 15:09:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:51,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778030] [2023-12-20 15:09:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:09:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778030] [2023-12-20 15:09:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:51,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:51,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:09:51,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896115053] [2023-12-20 15:09:51,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:51,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:51,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:51,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:51,511 INFO L87 Difference]: Start difference. First operand 5767 states and 7710 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 15:09:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:52,201 INFO L93 Difference]: Finished difference Result 14590 states and 19419 transitions. [2023-12-20 15:09:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 224 [2023-12-20 15:09:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:52,225 INFO L225 Difference]: With dead ends: 14590 [2023-12-20 15:09:52,225 INFO L226 Difference]: Without dead ends: 8824 [2023-12-20 15:09:52,233 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 15:09:52,233 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 202 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:52,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 418 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:09:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2023-12-20 15:09:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 8820. [2023-12-20 15:09:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8820 states, 8819 states have (on average 1.2787164077559814) internal successors, (11277), 8819 states have internal predecessors, (11277), 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 15:09:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8820 states to 8820 states and 11277 transitions. [2023-12-20 15:09:52,413 INFO L78 Accepts]: Start accepts. Automaton has 8820 states and 11277 transitions. Word has length 224 [2023-12-20 15:09:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:52,413 INFO L495 AbstractCegarLoop]: Abstraction has 8820 states and 11277 transitions. [2023-12-20 15:09:52,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 15:09:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 8820 states and 11277 transitions. [2023-12-20 15:09:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-12-20 15:09:52,424 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:52,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:09:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 15:09:52,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:52,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash -665975896, now seen corresponding path program 1 times [2023-12-20 15:09:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520891304] [2023-12-20 15:09:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:09:52,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520891304] [2023-12-20 15:09:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520891304] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:09:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316105365] [2023-12-20 15:09:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:52,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:09:52,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:09:52,730 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 15:09:52,756 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 15:09:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:52,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:09:52,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:09:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-20 15:09:53,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:09:53,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316105365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:53,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:09:53,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 15:09:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477339260] [2023-12-20 15:09:53,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:09:53,134 INFO L87 Difference]: Start difference. First operand 8820 states and 11277 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 15:09:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:53,766 INFO L93 Difference]: Finished difference Result 22146 states and 28842 transitions. [2023-12-20 15:09:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:53,767 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 226 [2023-12-20 15:09:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:53,809 INFO L225 Difference]: With dead ends: 22146 [2023-12-20 15:09:53,810 INFO L226 Difference]: Without dead ends: 13327 [2023-12-20 15:09:53,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 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 15:09:53,822 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:53,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 132 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:09:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13327 states. [2023-12-20 15:09:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13327 to 13315. [2023-12-20 15:09:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13315 states, 13314 states have (on average 1.2828601472134595) internal successors, (17080), 13314 states have internal predecessors, (17080), 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 15:09:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13315 states to 13315 states and 17080 transitions. [2023-12-20 15:09:54,074 INFO L78 Accepts]: Start accepts. Automaton has 13315 states and 17080 transitions. Word has length 226 [2023-12-20 15:09:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:54,074 INFO L495 AbstractCegarLoop]: Abstraction has 13315 states and 17080 transitions. [2023-12-20 15:09:54,075 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 15:09:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 13315 states and 17080 transitions. [2023-12-20 15:09:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-12-20 15:09:54,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:54,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:09:54,101 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 15:09:54,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:09:54,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:54,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1523662325, now seen corresponding path program 1 times [2023-12-20 15:09:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:54,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269163131] [2023-12-20 15:09:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:54,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:09:54,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269163131] [2023-12-20 15:09:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269163131] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:54,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:54,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:09:54,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156765136] [2023-12-20 15:09:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:54,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:09:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:09:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:09:54,662 INFO L87 Difference]: Start difference. First operand 13315 states and 17080 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 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 15:09:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:55,393 INFO L93 Difference]: Finished difference Result 31752 states and 40753 transitions. [2023-12-20 15:09:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:09:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 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 15:09:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:55,426 INFO L225 Difference]: With dead ends: 31752 [2023-12-20 15:09:55,427 INFO L226 Difference]: Without dead ends: 18438 [2023-12-20 15:09:55,449 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 15:09:55,451 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:55,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 173 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:09:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18438 states. [2023-12-20 15:09:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18438 to 18420. [2023-12-20 15:09:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18420 states, 18419 states have (on average 1.274770617297356) internal successors, (23480), 18419 states have internal predecessors, (23480), 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 15:09:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18420 states to 18420 states and 23480 transitions. [2023-12-20 15:09:55,738 INFO L78 Accepts]: Start accepts. Automaton has 18420 states and 23480 transitions. Word has length 230 [2023-12-20 15:09:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:55,738 INFO L495 AbstractCegarLoop]: Abstraction has 18420 states and 23480 transitions. [2023-12-20 15:09:55,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 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 15:09:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 18420 states and 23480 transitions. [2023-12-20 15:09:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-12-20 15:09:55,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:55,773 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, 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] [2023-12-20 15:09:55,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 15:09:55,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:55,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2014180228, now seen corresponding path program 1 times [2023-12-20 15:09:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134499769] [2023-12-20 15:09:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:09:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134499769] [2023-12-20 15:09:56,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134499769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:09:56,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223427704] [2023-12-20 15:09:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:56,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:09:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:09:56,190 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 15:09:56,212 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 15:09:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:56,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:09:56,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:09:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:09:56,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:09:56,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223427704] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:56,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:09:56,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:09:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573085646] [2023-12-20 15:09:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:56,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:09:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:09:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:09:56,497 INFO L87 Difference]: Start difference. First operand 18420 states and 23480 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 15:09:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:57,520 INFO L93 Difference]: Finished difference Result 51668 states and 67366 transitions. [2023-12-20 15:09:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:09:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 237 [2023-12-20 15:09:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:57,571 INFO L225 Difference]: With dead ends: 51668 [2023-12-20 15:09:57,572 INFO L226 Difference]: Without dead ends: 33249 [2023-12-20 15:09:57,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:09:57,594 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 584 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:57,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 183 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 15:09:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33249 states. [2023-12-20 15:09:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33249 to 33239. [2023-12-20 15:09:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33239 states, 33238 states have (on average 1.2033816715807208) internal successors, (39998), 33238 states have internal predecessors, (39998), 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 15:09:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33239 states to 33239 states and 39998 transitions. [2023-12-20 15:09:58,005 INFO L78 Accepts]: Start accepts. Automaton has 33239 states and 39998 transitions. Word has length 237 [2023-12-20 15:09:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:09:58,005 INFO L495 AbstractCegarLoop]: Abstraction has 33239 states and 39998 transitions. [2023-12-20 15:09:58,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 15:09:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 33239 states and 39998 transitions. [2023-12-20 15:09:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-20 15:09:58,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:09:58,039 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:09:58,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-20 15:09:58,244 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,SelfDestructingSolverStorable9 [2023-12-20 15:09:58,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:09:58,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:09:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -612997379, now seen corresponding path program 1 times [2023-12-20 15:09:58,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:09:58,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178497630] [2023-12-20 15:09:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:09:58,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:09:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:09:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:09:58,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:09:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178497630] [2023-12-20 15:09:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178497630] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:09:58,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:09:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:09:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414843608] [2023-12-20 15:09:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:09:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:09:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:09:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:09:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:09:58,587 INFO L87 Difference]: Start difference. First operand 33239 states and 39998 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 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 15:09:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:09:59,509 INFO L93 Difference]: Finished difference Result 79004 states and 95627 transitions. [2023-12-20 15:09:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:09:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 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 245 [2023-12-20 15:09:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:09:59,572 INFO L225 Difference]: With dead ends: 79004 [2023-12-20 15:09:59,575 INFO L226 Difference]: Without dead ends: 45969 [2023-12-20 15:09:59,606 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 15:09:59,608 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 585 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:09:59,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 52 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:09:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45969 states. [2023-12-20 15:10:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45969 to 43330. [2023-12-20 15:10:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43330 states, 43329 states have (on average 1.1515151515151516) internal successors, (49894), 43329 states have internal predecessors, (49894), 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 15:10:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43330 states to 43330 states and 49894 transitions. [2023-12-20 15:10:00,406 INFO L78 Accepts]: Start accepts. Automaton has 43330 states and 49894 transitions. Word has length 245 [2023-12-20 15:10:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:00,406 INFO L495 AbstractCegarLoop]: Abstraction has 43330 states and 49894 transitions. [2023-12-20 15:10:00,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 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 15:10:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43330 states and 49894 transitions. [2023-12-20 15:10:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-12-20 15:10:00,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:00,426 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, 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] [2023-12-20 15:10:00,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 15:10:00,427 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:00,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash -122919190, now seen corresponding path program 1 times [2023-12-20 15:10:00,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:00,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950799743] [2023-12-20 15:10:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:00,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950799743] [2023-12-20 15:10:00,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950799743] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:00,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:00,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:10:00,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719460246] [2023-12-20 15:10:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:00,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:00,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:10:00,729 INFO L87 Difference]: Start difference. First operand 43330 states and 49894 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 15:10:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:01,520 INFO L93 Difference]: Finished difference Result 96840 states and 111914 transitions. [2023-12-20 15:10:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:01,521 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 260 [2023-12-20 15:10:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:01,586 INFO L225 Difference]: With dead ends: 96840 [2023-12-20 15:10:01,586 INFO L226 Difference]: Without dead ends: 53714 [2023-12-20 15:10:01,617 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 15:10:01,618 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:01,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 143 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:10:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53714 states. [2023-12-20 15:10:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53714 to 53499. [2023-12-20 15:10:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53499 states, 53498 states have (on average 1.1574451381360051) internal successors, (61921), 53498 states have internal predecessors, (61921), 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 15:10:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53499 states to 53499 states and 61921 transitions. [2023-12-20 15:10:02,390 INFO L78 Accepts]: Start accepts. Automaton has 53499 states and 61921 transitions. Word has length 260 [2023-12-20 15:10:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:02,390 INFO L495 AbstractCegarLoop]: Abstraction has 53499 states and 61921 transitions. [2023-12-20 15:10:02,390 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 15:10:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 53499 states and 61921 transitions. [2023-12-20 15:10:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-12-20 15:10:02,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:02,410 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, 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] [2023-12-20 15:10:02,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 15:10:02,410 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:02,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 475101142, now seen corresponding path program 1 times [2023-12-20 15:10:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:02,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057762112] [2023-12-20 15:10:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:02,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:02,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:02,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057762112] [2023-12-20 15:10:02,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057762112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:10:02,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169191941] [2023-12-20 15:10:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:02,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:10:02,812 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 15:10:02,836 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 15:10:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:02,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:10:02,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:10:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:03,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:10:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169191941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:03,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:10:03,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:10:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653421294] [2023-12-20 15:10:03,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:03,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:10:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:10:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:03,008 INFO L87 Difference]: Start difference. First operand 53499 states and 61921 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 15:10:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:04,047 INFO L93 Difference]: Finished difference Result 153141 states and 177552 transitions. [2023-12-20 15:10:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:10:04,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 265 [2023-12-20 15:10:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:04,166 INFO L225 Difference]: With dead ends: 153141 [2023-12-20 15:10:04,166 INFO L226 Difference]: Without dead ends: 100253 [2023-12-20 15:10:04,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:04,203 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 760 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:04,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 307 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:10:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100253 states. [2023-12-20 15:10:05,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100253 to 85415. [2023-12-20 15:10:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85415 states, 85414 states have (on average 1.1460065094715153) internal successors, (97885), 85414 states have internal predecessors, (97885), 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 15:10:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85415 states to 85415 states and 97885 transitions. [2023-12-20 15:10:05,401 INFO L78 Accepts]: Start accepts. Automaton has 85415 states and 97885 transitions. Word has length 265 [2023-12-20 15:10:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:05,401 INFO L495 AbstractCegarLoop]: Abstraction has 85415 states and 97885 transitions. [2023-12-20 15:10:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 15:10:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 85415 states and 97885 transitions. [2023-12-20 15:10:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-20 15:10:05,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:05,425 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2023-12-20 15:10:05,435 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 15:10:05,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:05,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:05,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:05,636 INFO L85 PathProgramCache]: Analyzing trace with hash 487217244, now seen corresponding path program 1 times [2023-12-20 15:10:05,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:05,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228822129] [2023-12-20 15:10:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:05,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-20 15:10:06,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:06,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228822129] [2023-12-20 15:10:06,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228822129] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:06,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:06,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:10:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000246580] [2023-12-20 15:10:06,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:06,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:10:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:10:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:10:06,064 INFO L87 Difference]: Start difference. First operand 85415 states and 97885 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 15:10:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:07,377 INFO L93 Difference]: Finished difference Result 230627 states and 264176 transitions. [2023-12-20 15:10:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:10:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 275 [2023-12-20 15:10:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:07,562 INFO L225 Difference]: With dead ends: 230627 [2023-12-20 15:10:07,562 INFO L226 Difference]: Without dead ends: 145823 [2023-12-20 15:10:07,601 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 15:10:07,602 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 575 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:07,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 457 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:10:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145823 states. [2023-12-20 15:10:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145823 to 143378. [2023-12-20 15:10:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143378 states, 143377 states have (on average 1.1419823263145414) internal successors, (163734), 143377 states have internal predecessors, (163734), 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 15:10:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143378 states to 143378 states and 163734 transitions. [2023-12-20 15:10:09,496 INFO L78 Accepts]: Start accepts. Automaton has 143378 states and 163734 transitions. Word has length 275 [2023-12-20 15:10:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:09,496 INFO L495 AbstractCegarLoop]: Abstraction has 143378 states and 163734 transitions. [2023-12-20 15:10:09,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 15:10:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 143378 states and 163734 transitions. [2023-12-20 15:10:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-12-20 15:10:09,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:09,511 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 15:10:09,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:09,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash -988901499, now seen corresponding path program 1 times [2023-12-20 15:10:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912448703] [2023-12-20 15:10:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:10,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:10,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912448703] [2023-12-20 15:10:10,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912448703] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:10,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:10:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665702396] [2023-12-20 15:10:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:10,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:10:10,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:10:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:10:10,062 INFO L87 Difference]: Start difference. First operand 143378 states and 163734 transitions. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 3 states have internal predecessors, (260), 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 15:10:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:11,484 INFO L93 Difference]: Finished difference Result 296320 states and 338264 transitions. [2023-12-20 15:10:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:10:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 3 states have internal predecessors, (260), 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 300 [2023-12-20 15:10:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:11,909 INFO L225 Difference]: With dead ends: 296320 [2023-12-20 15:10:11,909 INFO L226 Difference]: Without dead ends: 153553 [2023-12-20 15:10:11,964 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 15:10:11,965 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 500 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:11,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 155 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:10:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153553 states. [2023-12-20 15:10:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153553 to 152726. [2023-12-20 15:10:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152726 states, 152725 states have (on average 1.1388377803241119) internal successors, (173929), 152725 states have internal predecessors, (173929), 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 15:10:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152726 states to 152726 states and 173929 transitions. [2023-12-20 15:10:14,154 INFO L78 Accepts]: Start accepts. Automaton has 152726 states and 173929 transitions. Word has length 300 [2023-12-20 15:10:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:14,154 INFO L495 AbstractCegarLoop]: Abstraction has 152726 states and 173929 transitions. [2023-12-20 15:10:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 3 states have internal predecessors, (260), 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 15:10:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 152726 states and 173929 transitions. [2023-12-20 15:10:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-12-20 15:10:14,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:14,172 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, 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, 1, 1, 1, 1, 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 15:10:14,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 15:10:14,172 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:14,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1780412865, now seen corresponding path program 1 times [2023-12-20 15:10:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:14,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411964595] [2023-12-20 15:10:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:10:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:14,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411964595] [2023-12-20 15:10:14,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411964595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:14,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:14,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:10:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324033532] [2023-12-20 15:10:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:10:14,435 INFO L87 Difference]: Start difference. First operand 152726 states and 173929 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 15:10:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:15,845 INFO L93 Difference]: Finished difference Result 310749 states and 355128 transitions. [2023-12-20 15:10:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:15,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 304 [2023-12-20 15:10:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:16,047 INFO L225 Difference]: With dead ends: 310749 [2023-12-20 15:10:16,047 INFO L226 Difference]: Without dead ends: 159448 [2023-12-20 15:10:16,123 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 15:10:16,124 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 173 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:16,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 372 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:10:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159448 states. [2023-12-20 15:10:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159448 to 155388. [2023-12-20 15:10:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155388 states, 155387 states have (on average 1.1273851737918874) internal successors, (175181), 155387 states have internal predecessors, (175181), 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 15:10:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155388 states to 155388 states and 175181 transitions. [2023-12-20 15:10:18,293 INFO L78 Accepts]: Start accepts. Automaton has 155388 states and 175181 transitions. Word has length 304 [2023-12-20 15:10:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:18,293 INFO L495 AbstractCegarLoop]: Abstraction has 155388 states and 175181 transitions. [2023-12-20 15:10:18,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 15:10:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 155388 states and 175181 transitions. [2023-12-20 15:10:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-12-20 15:10:18,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:18,516 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:18,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 15:10:18,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:18,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash 556117517, now seen corresponding path program 1 times [2023-12-20 15:10:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:18,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795138648] [2023-12-20 15:10:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-20 15:10:18,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795138648] [2023-12-20 15:10:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795138648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:10:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638808128] [2023-12-20 15:10:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:18,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:18,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:10:18,831 INFO L87 Difference]: Start difference. First operand 155388 states and 175181 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 15:10:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:20,344 INFO L93 Difference]: Finished difference Result 324195 states and 364773 transitions. [2023-12-20 15:10:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:20,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 327 [2023-12-20 15:10:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:20,522 INFO L225 Difference]: With dead ends: 324195 [2023-12-20 15:10:20,522 INFO L226 Difference]: Without dead ends: 170435 [2023-12-20 15:10:20,564 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 15:10:20,566 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 203 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:20,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 155 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:10:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170435 states. [2023-12-20 15:10:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170435 to 168809. [2023-12-20 15:10:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168809 states, 168808 states have (on average 1.1232939197194445) internal successors, (189621), 168808 states have internal predecessors, (189621), 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 15:10:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168809 states to 168809 states and 189621 transitions. [2023-12-20 15:10:22,889 INFO L78 Accepts]: Start accepts. Automaton has 168809 states and 189621 transitions. Word has length 327 [2023-12-20 15:10:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:22,889 INFO L495 AbstractCegarLoop]: Abstraction has 168809 states and 189621 transitions. [2023-12-20 15:10:22,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 15:10:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 168809 states and 189621 transitions. [2023-12-20 15:10:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-12-20 15:10:22,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:22,910 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 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, 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] [2023-12-20 15:10:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 15:10:22,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:22,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:22,910 INFO L85 PathProgramCache]: Analyzing trace with hash 640259646, now seen corresponding path program 1 times [2023-12-20 15:10:22,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:22,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087895635] [2023-12-20 15:10:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:22,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-20 15:10:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087895635] [2023-12-20 15:10:23,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087895635] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:23,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:23,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:10:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442382091] [2023-12-20 15:10:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:23,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:10:23,328 INFO L87 Difference]: Start difference. First operand 168809 states and 189621 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 15:10:24,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:24,542 INFO L93 Difference]: Finished difference Result 327081 states and 367574 transitions. [2023-12-20 15:10:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 329 [2023-12-20 15:10:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:24,727 INFO L225 Difference]: With dead ends: 327081 [2023-12-20 15:10:24,728 INFO L226 Difference]: Without dead ends: 160716 [2023-12-20 15:10:25,015 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 15:10:25,016 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 167 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:25,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 344 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:10:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160716 states. [2023-12-20 15:10:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160716 to 139757. [2023-12-20 15:10:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139757 states, 139756 states have (on average 1.1236512206989324) internal successors, (157037), 139756 states have internal predecessors, (157037), 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 15:10:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139757 states to 139757 states and 157037 transitions. [2023-12-20 15:10:27,013 INFO L78 Accepts]: Start accepts. Automaton has 139757 states and 157037 transitions. Word has length 329 [2023-12-20 15:10:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:27,014 INFO L495 AbstractCegarLoop]: Abstraction has 139757 states and 157037 transitions. [2023-12-20 15:10:27,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 15:10:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 139757 states and 157037 transitions. [2023-12-20 15:10:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-12-20 15:10:27,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:27,032 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 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, 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] [2023-12-20 15:10:27,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 15:10:27,033 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:27,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash -161823286, now seen corresponding path program 1 times [2023-12-20 15:10:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:27,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891603552] [2023-12-20 15:10:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-20 15:10:27,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891603552] [2023-12-20 15:10:27,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891603552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:27,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:27,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:10:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566412645] [2023-12-20 15:10:27,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:27,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:10:27,179 INFO L87 Difference]: Start difference. First operand 139757 states and 157037 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 15:10:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:28,622 INFO L93 Difference]: Finished difference Result 250832 states and 280508 transitions. [2023-12-20 15:10:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:28,622 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 336 [2023-12-20 15:10:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:28,771 INFO L225 Difference]: With dead ends: 250832 [2023-12-20 15:10:28,771 INFO L226 Difference]: Without dead ends: 110876 [2023-12-20 15:10:28,828 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 15:10:28,828 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 223 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:28,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 307 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:10:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110876 states. [2023-12-20 15:10:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110876 to 90560. [2023-12-20 15:10:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90560 states, 90559 states have (on average 1.071831623582416) internal successors, (97064), 90559 states have internal predecessors, (97064), 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 15:10:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90560 states to 90560 states and 97064 transitions. [2023-12-20 15:10:30,063 INFO L78 Accepts]: Start accepts. Automaton has 90560 states and 97064 transitions. Word has length 336 [2023-12-20 15:10:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:30,063 INFO L495 AbstractCegarLoop]: Abstraction has 90560 states and 97064 transitions. [2023-12-20 15:10:30,063 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 15:10:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 90560 states and 97064 transitions. [2023-12-20 15:10:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-12-20 15:10:30,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:30,079 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-20 15:10:30,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 15:10:30,079 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:30,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash 131083553, now seen corresponding path program 1 times [2023-12-20 15:10:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:30,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506727621] [2023-12-20 15:10:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:30,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 159 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:30,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:30,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506727621] [2023-12-20 15:10:30,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506727621] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:10:30,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184526949] [2023-12-20 15:10:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:30,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:10:30,545 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 15:10:30,547 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 15:10:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:30,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:10:30,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:10:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:30,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:10:30,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184526949] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:30,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:10:30,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:10:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932762729] [2023-12-20 15:10:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:30,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:10:30,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:10:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:30,847 INFO L87 Difference]: Start difference. First operand 90560 states and 97064 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 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 15:10:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:32,022 INFO L93 Difference]: Finished difference Result 189689 states and 203345 transitions. [2023-12-20 15:10:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:10:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 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 15:10:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:32,138 INFO L225 Difference]: With dead ends: 189689 [2023-12-20 15:10:32,138 INFO L226 Difference]: Without dead ends: 101576 [2023-12-20 15:10:32,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:32,186 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 455 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:32,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 94 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:10:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101576 states. [2023-12-20 15:10:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101576 to 96847. [2023-12-20 15:10:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96847 states, 96846 states have (on average 1.0596307539805465) internal successors, (102621), 96846 states have internal predecessors, (102621), 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 15:10:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96847 states to 96847 states and 102621 transitions. [2023-12-20 15:10:33,470 INFO L78 Accepts]: Start accepts. Automaton has 96847 states and 102621 transitions. Word has length 338 [2023-12-20 15:10:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:33,470 INFO L495 AbstractCegarLoop]: Abstraction has 96847 states and 102621 transitions. [2023-12-20 15:10:33,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 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 15:10:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 96847 states and 102621 transitions. [2023-12-20 15:10:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-12-20 15:10:33,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:33,484 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, 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, 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] [2023-12-20 15:10:33,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-20 15:10:33,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:33,691 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:33,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash -67281699, now seen corresponding path program 1 times [2023-12-20 15:10:33,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:33,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974770365] [2023-12-20 15:10:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-20 15:10:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:34,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974770365] [2023-12-20 15:10:34,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974770365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:34,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:10:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:10:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436839980] [2023-12-20 15:10:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:34,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:10:34,054 INFO L87 Difference]: Start difference. First operand 96847 states and 102621 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 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 15:10:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:34,930 INFO L93 Difference]: Finished difference Result 274463 states and 290639 transitions. [2023-12-20 15:10:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 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 360 [2023-12-20 15:10:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:35,125 INFO L225 Difference]: With dead ends: 274463 [2023-12-20 15:10:35,125 INFO L226 Difference]: Without dead ends: 179244 [2023-12-20 15:10:35,176 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 15:10:35,177 INFO L413 NwaCegarLoop]: 247 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, 483 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:35,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 483 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 15:10:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179244 states. [2023-12-20 15:10:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179244 to 177604. [2023-12-20 15:10:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177604 states, 177603 states have (on average 1.0582197372792126) internal successors, (187943), 177603 states have internal predecessors, (187943), 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 15:10:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177604 states to 177604 states and 187943 transitions. [2023-12-20 15:10:37,339 INFO L78 Accepts]: Start accepts. Automaton has 177604 states and 187943 transitions. Word has length 360 [2023-12-20 15:10:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:37,339 INFO L495 AbstractCegarLoop]: Abstraction has 177604 states and 187943 transitions. [2023-12-20 15:10:37,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 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 15:10:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 177604 states and 187943 transitions. [2023-12-20 15:10:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-12-20 15:10:37,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:37,353 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, 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, 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] [2023-12-20 15:10:37,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 15:10:37,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:37,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash 831816958, now seen corresponding path program 1 times [2023-12-20 15:10:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:37,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394619582] [2023-12-20 15:10:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 263 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-20 15:10:38,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:38,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394619582] [2023-12-20 15:10:38,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394619582] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:10:38,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851063381] [2023-12-20 15:10:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:38,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:38,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:10:38,022 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 15:10:38,025 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 15:10:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:38,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:10:38,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:10:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-20 15:10:38,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:10:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851063381] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:38,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:10:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-20 15:10:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5334506] [2023-12-20 15:10:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:10:38,344 INFO L87 Difference]: Start difference. First operand 177604 states and 187943 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 15:10:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:39,611 INFO L93 Difference]: Finished difference Result 362953 states and 384205 transitions. [2023-12-20 15:10:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 387 [2023-12-20 15:10:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:39,816 INFO L225 Difference]: With dead ends: 362953 [2023-12-20 15:10:39,816 INFO L226 Difference]: Without dead ends: 178245 [2023-12-20 15:10:39,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 387 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 15:10:39,899 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 166 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:39,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 329 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:10:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178245 states. [2023-12-20 15:10:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178245 to 170497. [2023-12-20 15:10:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170497 states, 170496 states have (on average 1.0522182338588588) internal successors, (179399), 170496 states have internal predecessors, (179399), 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 15:10:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170497 states to 170497 states and 179399 transitions. [2023-12-20 15:10:42,146 INFO L78 Accepts]: Start accepts. Automaton has 170497 states and 179399 transitions. Word has length 387 [2023-12-20 15:10:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:42,147 INFO L495 AbstractCegarLoop]: Abstraction has 170497 states and 179399 transitions. [2023-12-20 15:10:42,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 15:10:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 170497 states and 179399 transitions. [2023-12-20 15:10:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-12-20 15:10:42,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:42,162 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-20 15:10:42,173 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 15:10:42,363 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,SelfDestructingSolverStorable21 [2023-12-20 15:10:42,364 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:42,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:42,365 INFO L85 PathProgramCache]: Analyzing trace with hash -443753068, now seen corresponding path program 1 times [2023-12-20 15:10:42,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:42,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143724944] [2023-12-20 15:10:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 235 proven. 30 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 15:10:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143724944] [2023-12-20 15:10:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143724944] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:10:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036919688] [2023-12-20 15:10:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:42,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:42,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:10:42,969 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 15:10:43,000 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 15:10:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:43,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 15:10:43,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:10:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-20 15:10:43,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:10:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036919688] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:43,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:10:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 15:10:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423485483] [2023-12-20 15:10:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:43,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:10:43,515 INFO L87 Difference]: Start difference. First operand 170497 states and 179399 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 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 15:10:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:44,536 INFO L93 Difference]: Finished difference Result 334264 states and 351819 transitions. [2023-12-20 15:10:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:44,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 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 397 [2023-12-20 15:10:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:44,753 INFO L225 Difference]: With dead ends: 334264 [2023-12-20 15:10:44,754 INFO L226 Difference]: Without dead ends: 166409 [2023-12-20 15:10:44,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:10:44,831 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 157 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:44,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 26 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:10:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166409 states. [2023-12-20 15:10:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166409 to 165597. [2023-12-20 15:10:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165597 states, 165596 states have (on average 1.052205367279403) internal successors, (174241), 165596 states have internal predecessors, (174241), 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 15:10:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165597 states to 165597 states and 174241 transitions. [2023-12-20 15:10:47,115 INFO L78 Accepts]: Start accepts. Automaton has 165597 states and 174241 transitions. Word has length 397 [2023-12-20 15:10:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:47,115 INFO L495 AbstractCegarLoop]: Abstraction has 165597 states and 174241 transitions. [2023-12-20 15:10:47,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 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 15:10:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 165597 states and 174241 transitions. [2023-12-20 15:10:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2023-12-20 15:10:47,128 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:47,129 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, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:47,136 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 15:10:47,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:47,332 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:47,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -966978385, now seen corresponding path program 1 times [2023-12-20 15:10:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:47,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943873018] [2023-12-20 15:10:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-12-20 15:10:47,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943873018] [2023-12-20 15:10:47,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943873018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:10:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698785647] [2023-12-20 15:10:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:10:47,814 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 15:10:47,831 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 15:10:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:47,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:10:47,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:10:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 289 proven. 37 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-20 15:10:48,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 15:10:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 289 proven. 37 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-20 15:10:48,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698785647] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 15:10:48,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 15:10:48,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-12-20 15:10:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546480267] [2023-12-20 15:10:48,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 15:10:48,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 15:10:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 15:10:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:48,240 INFO L87 Difference]: Start difference. First operand 165597 states and 174241 transitions. Second operand has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 5 states have internal predecessors, (371), 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 15:10:50,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:50,523 INFO L93 Difference]: Finished difference Result 364032 states and 383309 transitions. [2023-12-20 15:10:50,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 15:10:50,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 5 states have internal predecessors, (371), 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 406 [2023-12-20 15:10:50,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:50,748 INFO L225 Difference]: With dead ends: 364032 [2023-12-20 15:10:50,749 INFO L226 Difference]: Without dead ends: 195391 [2023-12-20 15:10:50,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 809 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 15:10:50,825 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2459 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:50,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 134 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 15:10:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195391 states. [2023-12-20 15:10:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195391 to 171315. [2023-12-20 15:10:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171315 states, 171314 states have (on average 1.0488226297909102) internal successors, (179678), 171314 states have internal predecessors, (179678), 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 15:10:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171315 states to 171315 states and 179678 transitions. [2023-12-20 15:10:53,259 INFO L78 Accepts]: Start accepts. Automaton has 171315 states and 179678 transitions. Word has length 406 [2023-12-20 15:10:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:10:53,259 INFO L495 AbstractCegarLoop]: Abstraction has 171315 states and 179678 transitions. [2023-12-20 15:10:53,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 5 states have internal predecessors, (371), 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 15:10:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 171315 states and 179678 transitions. [2023-12-20 15:10:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-12-20 15:10:53,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:10:53,273 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-20 15:10:53,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 15:10:53,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:53,476 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:10:53,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:10:53,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1160029599, now seen corresponding path program 1 times [2023-12-20 15:10:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:10:53,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357392781] [2023-12-20 15:10:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:53,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:10:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 564 proven. 18 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-12-20 15:10:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:10:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357392781] [2023-12-20 15:10:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357392781] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:10:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951863722] [2023-12-20 15:10:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:10:54,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:10:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:10:54,217 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 15:10:54,218 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 15:10:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:10:54,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:10:54,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:10:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-20 15:10:54,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:10:54,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951863722] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:10:54,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:10:54,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-20 15:10:54,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015823082] [2023-12-20 15:10:54,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:10:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:10:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:10:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:10:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:54,593 INFO L87 Difference]: Start difference. First operand 171315 states and 179678 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 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 15:10:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:10:56,066 INFO L93 Difference]: Finished difference Result 477472 states and 500926 transitions. [2023-12-20 15:10:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:10:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 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 499 [2023-12-20 15:10:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:10:56,480 INFO L225 Difference]: With dead ends: 477472 [2023-12-20 15:10:56,480 INFO L226 Difference]: Without dead ends: 308393 [2023-12-20 15:10:56,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:10:56,548 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 158 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:10:56,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 476 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:10:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308393 states. [2023-12-20 15:10:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308393 to 293900. [2023-12-20 15:11:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293900 states, 293899 states have (on average 1.049595269123066) internal successors, (308475), 293899 states have internal predecessors, (308475), 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 15:11:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293900 states to 293900 states and 308475 transitions. [2023-12-20 15:11:00,874 INFO L78 Accepts]: Start accepts. Automaton has 293900 states and 308475 transitions. Word has length 499 [2023-12-20 15:11:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:00,878 INFO L495 AbstractCegarLoop]: Abstraction has 293900 states and 308475 transitions. [2023-12-20 15:11:00,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 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 15:11:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 293900 states and 308475 transitions. [2023-12-20 15:11:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-20 15:11:00,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:11:00,898 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:00,908 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 15:11:01,104 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,SelfDestructingSolverStorable24 [2023-12-20 15:11:01,105 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:11:01,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:11:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1616802062, now seen corresponding path program 1 times [2023-12-20 15:11:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:11:01,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598698063] [2023-12-20 15:11:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:11:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 385 proven. 9 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-12-20 15:11:02,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:11:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598698063] [2023-12-20 15:11:02,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598698063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:11:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668901670] [2023-12-20 15:11:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:02,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:11:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:11:02,043 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 15:11:02,045 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 15:11:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:02,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:11:02,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:11:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-12-20 15:11:02,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:11:02,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668901670] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:11:02,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:11:02,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:11:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431395311] [2023-12-20 15:11:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:11:02,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:11:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:11:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:11:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:11:02,460 INFO L87 Difference]: Start difference. First operand 293900 states and 308475 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 15:11:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:11:04,444 INFO L93 Difference]: Finished difference Result 577888 states and 606642 transitions. [2023-12-20 15:11:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:11:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 534 [2023-12-20 15:11:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:11:04,809 INFO L225 Difference]: With dead ends: 577888 [2023-12-20 15:11:04,809 INFO L226 Difference]: Without dead ends: 285004 [2023-12-20 15:11:04,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 533 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 15:11:04,924 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 209 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:11:04,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 334 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:11:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285004 states. [2023-12-20 15:11:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285004 to 272322. [2023-12-20 15:11:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272322 states, 272321 states have (on average 1.0477855178263886) internal successors, (285334), 272321 states have internal predecessors, (285334), 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 15:11:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272322 states to 272322 states and 285334 transitions. [2023-12-20 15:11:08,900 INFO L78 Accepts]: Start accepts. Automaton has 272322 states and 285334 transitions. Word has length 534 [2023-12-20 15:11:08,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:08,900 INFO L495 AbstractCegarLoop]: Abstraction has 272322 states and 285334 transitions. [2023-12-20 15:11:08,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 15:11:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 272322 states and 285334 transitions. [2023-12-20 15:11:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2023-12-20 15:11:08,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:11:08,918 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, 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, 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 15:11:08,927 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 15:11:09,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 15:11:09,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:11:09,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:11:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1781087045, now seen corresponding path program 1 times [2023-12-20 15:11:09,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:11:09,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423344350] [2023-12-20 15:11:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:09,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:11:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 595 proven. 143 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-12-20 15:11:10,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:11:10,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423344350] [2023-12-20 15:11:10,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423344350] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:11:10,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386704921] [2023-12-20 15:11:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:10,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:11:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:11:10,714 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 15:11:10,732 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 15:11:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:10,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:11:10,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:11:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-12-20 15:11:11,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:11:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386704921] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:11:11,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:11:11,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-12-20 15:11:11,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213472023] [2023-12-20 15:11:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:11:11,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:11:11,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:11:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:11:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-20 15:11:11,220 INFO L87 Difference]: Start difference. First operand 272322 states and 285334 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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 15:11:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:11:13,386 INFO L93 Difference]: Finished difference Result 533314 states and 558004 transitions. [2023-12-20 15:11:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:11:13,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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 564 [2023-12-20 15:11:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:11:13,724 INFO L225 Difference]: With dead ends: 533314 [2023-12-20 15:11:13,724 INFO L226 Difference]: Without dead ends: 257745 [2023-12-20 15:11:13,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 562 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 15:11:13,821 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 517 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:11:13,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 278 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:11:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257745 states. [2023-12-20 15:11:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257745 to 239035. [2023-12-20 15:11:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239035 states, 239034 states have (on average 1.0457466301865006) internal successors, (249969), 239034 states have internal predecessors, (249969), 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 15:11:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239035 states to 239035 states and 249969 transitions. [2023-12-20 15:11:17,360 INFO L78 Accepts]: Start accepts. Automaton has 239035 states and 249969 transitions. Word has length 564 [2023-12-20 15:11:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:17,361 INFO L495 AbstractCegarLoop]: Abstraction has 239035 states and 249969 transitions. [2023-12-20 15:11:17,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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 15:11:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 239035 states and 249969 transitions. [2023-12-20 15:11:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2023-12-20 15:11:17,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:11:17,372 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 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, 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] [2023-12-20 15:11:17,380 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 15:11:17,573 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,SelfDestructingSolverStorable26 [2023-12-20 15:11:17,573 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:11:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:11:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1705219557, now seen corresponding path program 1 times [2023-12-20 15:11:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:11:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284796223] [2023-12-20 15:11:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:11:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 703 proven. 18 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-12-20 15:11:18,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:11:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284796223] [2023-12-20 15:11:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284796223] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:11:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347371120] [2023-12-20 15:11:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:18,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:11:18,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:11:18,552 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 15:11:18,553 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 15:11:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:18,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:11:18,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:11:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 770 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-20 15:11:19,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:11:19,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347371120] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:11:19,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:11:19,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-12-20 15:11:19,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695060262] [2023-12-20 15:11:19,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:11:19,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:11:19,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:11:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:11:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:11:19,038 INFO L87 Difference]: Start difference. First operand 239035 states and 249969 transitions. Second operand has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 15:11:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:11:20,538 INFO L93 Difference]: Finished difference Result 320975 states and 334982 transitions. [2023-12-20 15:11:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:11:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 579 [2023-12-20 15:11:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:11:20,608 INFO L225 Difference]: With dead ends: 320975 [2023-12-20 15:11:20,609 INFO L226 Difference]: Without dead ends: 68745 [2023-12-20 15:11:20,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 577 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 15:11:20,635 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 256 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:11:20,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 319 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:11:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68745 states. [2023-12-20 15:11:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68745 to 53702. [2023-12-20 15:11:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53702 states, 53701 states have (on average 1.035976983668833) internal successors, (55633), 53701 states have internal predecessors, (55633), 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 15:11:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53702 states to 53702 states and 55633 transitions. [2023-12-20 15:11:21,377 INFO L78 Accepts]: Start accepts. Automaton has 53702 states and 55633 transitions. Word has length 579 [2023-12-20 15:11:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:21,377 INFO L495 AbstractCegarLoop]: Abstraction has 53702 states and 55633 transitions. [2023-12-20 15:11:21,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 15:11:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 53702 states and 55633 transitions. [2023-12-20 15:11:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1823 [2023-12-20 15:11:21,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:11:21,423 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 25, 25, 25, 25, 25, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 21, 21, 21, 21, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 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] [2023-12-20 15:11:21,429 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 15:11:21,623 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,SelfDestructingSolverStorable27 [2023-12-20 15:11:21,624 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:11:21,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:11:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1765506755, now seen corresponding path program 1 times [2023-12-20 15:11:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:11:21,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182894806] [2023-12-20 15:11:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:21,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:11:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14384 backedges. 2744 proven. 0 refuted. 0 times theorem prover too weak. 11640 trivial. 0 not checked. [2023-12-20 15:11:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:11:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182894806] [2023-12-20 15:11:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182894806] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:11:22,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:11:22,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:11:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859227385] [2023-12-20 15:11:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:11:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:11:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:11:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:11:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:11:22,887 INFO L87 Difference]: Start difference. First operand 53702 states and 55633 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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 15:11:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:11:23,368 INFO L93 Difference]: Finished difference Result 107196 states and 111054 transitions. [2023-12-20 15:11:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:11:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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 1822 [2023-12-20 15:11:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:11:23,428 INFO L225 Difference]: With dead ends: 107196 [2023-12-20 15:11:23,428 INFO L226 Difference]: Without dead ends: 53698 [2023-12-20 15:11:23,445 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 15:11:23,446 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 181 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:11:23,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 22 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:11:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53698 states. [2023-12-20 15:11:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53698 to 53698. [2023-12-20 15:11:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53698 states, 53697 states have (on average 1.0358120565394715) internal successors, (55620), 53697 states have internal predecessors, (55620), 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 15:11:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 55620 transitions. [2023-12-20 15:11:24,082 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 55620 transitions. Word has length 1822 [2023-12-20 15:11:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:24,083 INFO L495 AbstractCegarLoop]: Abstraction has 53698 states and 55620 transitions. [2023-12-20 15:11:24,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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 15:11:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 55620 transitions. [2023-12-20 15:11:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1838 [2023-12-20 15:11:24,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:11:24,130 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 26, 26, 26, 26, 26, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 21, 21, 21, 21, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 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] [2023-12-20 15:11:24,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-20 15:11:24,130 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:11:24,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:11:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash 215959000, now seen corresponding path program 1 times [2023-12-20 15:11:24,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:11:24,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978895681] [2023-12-20 15:11:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:24,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:11:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14763 backedges. 4454 proven. 192 refuted. 0 times theorem prover too weak. 10117 trivial. 0 not checked. [2023-12-20 15:11:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:11:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978895681] [2023-12-20 15:11:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978895681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:11:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914647023] [2023-12-20 15:11:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:26,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:11:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:11:26,848 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 15:11:26,860 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 15:11:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:27,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 2974 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:11:27,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:11:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14763 backedges. 9434 proven. 0 refuted. 0 times theorem prover too weak. 5329 trivial. 0 not checked. [2023-12-20 15:11:27,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:11:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914647023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:11:27,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:11:27,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-12-20 15:11:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250240155] [2023-12-20 15:11:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:11:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:11:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:11:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:11:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:11:27,941 INFO L87 Difference]: Start difference. First operand 53698 states and 55620 transitions. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 15:11:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:11:28,435 INFO L93 Difference]: Finished difference Result 139315 states and 144358 transitions. [2023-12-20 15:11:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:11:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 1837 [2023-12-20 15:11:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:11:28,523 INFO L225 Difference]: With dead ends: 139315 [2023-12-20 15:11:28,524 INFO L226 Difference]: Without dead ends: 85415 [2023-12-20 15:11:28,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1841 GetRequests, 1836 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:11:28,564 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 117 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:11:28,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 656 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:11:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85415 states. [2023-12-20 15:11:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85415 to 83379. [2023-12-20 15:11:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83379 states, 83378 states have (on average 1.0339777879056826) internal successors, (86211), 83378 states have internal predecessors, (86211), 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 15:11:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83379 states to 83379 states and 86211 transitions. [2023-12-20 15:11:29,583 INFO L78 Accepts]: Start accepts. Automaton has 83379 states and 86211 transitions. Word has length 1837 [2023-12-20 15:11:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:29,584 INFO L495 AbstractCegarLoop]: Abstraction has 83379 states and 86211 transitions. [2023-12-20 15:11:29,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 15:11:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 83379 states and 86211 transitions. [2023-12-20 15:11:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2030 [2023-12-20 15:11:29,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:11:29,662 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 23, 23, 23, 23, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 14, 14, 13, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:11:29,673 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 15:11:29,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:11:29,863 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:11:29,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:11:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash -730828750, now seen corresponding path program 1 times [2023-12-20 15:11:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:11:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567911223] [2023-12-20 15:11:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:11:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18298 backedges. 5041 proven. 192 refuted. 0 times theorem prover too weak. 13065 trivial. 0 not checked. [2023-12-20 15:11:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:11:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567911223] [2023-12-20 15:11:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567911223] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:11:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050101634] [2023-12-20 15:11:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:11:32,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:11:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:11:32,805 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 15:11:32,806 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 15:11:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:11:33,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 3258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:11:33,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:11:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18298 backedges. 9101 proven. 0 refuted. 0 times theorem prover too weak. 9197 trivial. 0 not checked. [2023-12-20 15:11:33,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:11:33,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050101634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:11:33,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:11:33,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-12-20 15:11:33,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861200844] [2023-12-20 15:11:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:11:33,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:11:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:11:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:11:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:11:33,814 INFO L87 Difference]: Start difference. First operand 83379 states and 86211 transitions. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 15:11:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:11:34,077 INFO L93 Difference]: Finished difference Result 101075 states and 104517 transitions. [2023-12-20 15:11:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:11:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 2029 [2023-12-20 15:11:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:11:34,078 INFO L225 Difference]: With dead ends: 101075 [2023-12-20 15:11:34,078 INFO L226 Difference]: Without dead ends: 0 [2023-12-20 15:11:34,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2033 GetRequests, 2028 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:11:34,113 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 185 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 15:11:34,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 204 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 15:11:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-20 15:11:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-20 15:11:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 15:11:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-20 15:11:34,114 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2029 [2023-12-20 15:11:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:11:34,114 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-20 15:11:34,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 15:11:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-20 15:11:34,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-20 15:11:34,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 15:11:34,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-20 15:11:34,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-20 15:11:34,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.