/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/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 12:04:13,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 12:04:13,678 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 12:04:13,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 12:04:13,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 12:04:13,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 12:04:13,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 12:04:13,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 12:04:13,711 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 12:04:13,714 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 12:04:13,714 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 12:04:13,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 12:04:13,715 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 12:04:13,715 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 12:04:13,715 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 12:04:13,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 12:04:13,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 12:04:13,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 12:04:13,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 12:04:13,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 12:04:13,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 12:04:13,718 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 12:04:13,718 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 12:04:13,718 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 12:04:13,718 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 12:04:13,719 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 12:04:13,719 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 12:04:13,719 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 12:04:13,720 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 12:04:13,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 12:04:13,721 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 12:04:13,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 12:04:13,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 12:04:13,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 12:04:13,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 12:04:13,722 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 12:04:13,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 12:04:13,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 12:04:13,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 12:04:13,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 12:04:13,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 12:04:13,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 12:04:13,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 12:04:13,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 12:04:13,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 12:04:13,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 12:04:13,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 12:04:13,896 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 12:04:13,897 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 12:04:13,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-12-21 12:04:15,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 12:04:15,302 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 12:04:15,303 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-12-21 12:04:15,315 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ca2eca6/ba8ee2b9093d48ca96e1ea67f486ef1d/FLAG6075fd5eb [2023-12-21 12:04:15,330 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ca2eca6/ba8ee2b9093d48ca96e1ea67f486ef1d [2023-12-21 12:04:15,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 12:04:15,334 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 12:04:15,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 12:04:15,338 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 12:04:15,342 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 12:04:15,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7a981e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15, skipping insertion in model container [2023-12-21 12:04:15,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,396 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 12:04:15,666 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2023-12-21 12:04:15,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 12:04:15,680 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 12:04:15,743 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2023-12-21 12:04:15,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 12:04:15,758 INFO L206 MainTranslator]: Completed translation [2023-12-21 12:04:15,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15 WrapperNode [2023-12-21 12:04:15,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 12:04:15,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 12:04:15,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 12:04:15,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 12:04:15,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,827 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1003 [2023-12-21 12:04:15,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 12:04:15,828 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 12:04:15,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 12:04:15,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 12:04:15,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,847 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,869 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]. [2023-12-21 12:04:15,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 12:04:15,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 12:04:15,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 12:04:15,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 12:04:15,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (1/1) ... [2023-12-21 12:04:15,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 12:04:15,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 12:04:15,970 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) [2023-12-21 12:04:16,012 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 [2023-12-21 12:04:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 12:04:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 12:04:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 12:04:16,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 12:04:16,153 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 12:04:16,155 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 12:04:16,928 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 12:04:16,985 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 12:04:16,986 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 12:04:16,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:16 BoogieIcfgContainer [2023-12-21 12:04:16,986 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 12:04:16,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 12:04:16,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 12:04:16,991 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 12:04:16,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:04:15" (1/3) ... [2023-12-21 12:04:16,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea895ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:16, skipping insertion in model container [2023-12-21 12:04:16,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:15" (2/3) ... [2023-12-21 12:04:16,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea895ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:16, skipping insertion in model container [2023-12-21 12:04:16,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:16" (3/3) ... [2023-12-21 12:04:16,993 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-12-21 12:04:17,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 12:04:17,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 12:04:17,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 12:04:17,065 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;@6fe347d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 12:04:17,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 12:04:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 303 states, 301 states have (on average 1.8372093023255813) internal successors, (553), 302 states have internal predecessors, (553), 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) [2023-12-21 12:04:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-21 12:04:17,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:17,099 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] [2023-12-21 12:04:17,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:17,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash 272906659, now seen corresponding path program 1 times [2023-12-21 12:04:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102583535] [2023-12-21 12:04:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:17,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:17,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:17,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102583535] [2023-12-21 12:04:17,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102583535] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:17,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:17,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 12:04:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532087974] [2023-12-21 12:04:17,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 12:04:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 12:04:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 12:04:17,495 INFO L87 Difference]: Start difference. First operand has 303 states, 301 states have (on average 1.8372093023255813) internal successors, (553), 302 states have internal predecessors, (553), 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 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-12-21 12:04:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:17,555 INFO L93 Difference]: Finished difference Result 411 states and 745 transitions. [2023-12-21 12:04:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 12:04:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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 74 [2023-12-21 12:04:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:17,578 INFO L225 Difference]: With dead ends: 411 [2023-12-21 12:04:17,578 INFO L226 Difference]: Without dead ends: 301 [2023-12-21 12:04:17,582 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 [2023-12-21 12:04:17,586 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:17,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 545 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-12-21 12:04:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-12-21 12:04:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.8266666666666667) internal successors, (548), 300 states have internal predecessors, (548), 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) [2023-12-21 12:04:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 548 transitions. [2023-12-21 12:04:17,635 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 548 transitions. Word has length 74 [2023-12-21 12:04:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:17,635 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 548 transitions. [2023-12-21 12:04:17,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-12-21 12:04:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 548 transitions. [2023-12-21 12:04:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-21 12:04:17,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:17,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 12:04:17,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 12:04:17,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:17,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1532531675, now seen corresponding path program 1 times [2023-12-21 12:04:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:17,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015924240] [2023-12-21 12:04:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:17,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015924240] [2023-12-21 12:04:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015924240] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:17,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:17,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:04:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224335140] [2023-12-21 12:04:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:17,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:04:17,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:04:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:17,872 INFO L87 Difference]: Start difference. First operand 301 states and 548 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2023-12-21 12:04:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:17,967 INFO L93 Difference]: Finished difference Result 411 states and 739 transitions. [2023-12-21 12:04:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:04:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 74 [2023-12-21 12:04:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:17,970 INFO L225 Difference]: With dead ends: 411 [2023-12-21 12:04:17,970 INFO L226 Difference]: Without dead ends: 301 [2023-12-21 12:04:17,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:17,971 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 0 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:17,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1586 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:04:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-12-21 12:04:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-12-21 12:04:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.6733333333333333) internal successors, (502), 300 states have internal predecessors, (502), 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) [2023-12-21 12:04:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 502 transitions. [2023-12-21 12:04:17,983 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 502 transitions. Word has length 74 [2023-12-21 12:04:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:17,983 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 502 transitions. [2023-12-21 12:04:17,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2023-12-21 12:04:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 502 transitions. [2023-12-21 12:04:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 12:04:17,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:17,987 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] [2023-12-21 12:04:17,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 12:04:17,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:17,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 232458923, now seen corresponding path program 1 times [2023-12-21 12:04:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:17,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027070882] [2023-12-21 12:04:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:17,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:18,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:18,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027070882] [2023-12-21 12:04:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027070882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:18,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533676170] [2023-12-21 12:04:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:18,213 INFO L87 Difference]: Start difference. First operand 301 states and 502 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-12-21 12:04:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:18,255 INFO L93 Difference]: Finished difference Result 503 states and 856 transitions. [2023-12-21 12:04:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2023-12-21 12:04:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:18,258 INFO L225 Difference]: With dead ends: 503 [2023-12-21 12:04:18,258 INFO L226 Difference]: Without dead ends: 396 [2023-12-21 12:04:18,262 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 [2023-12-21 12:04:18,264 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 157 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:18,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 938 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-12-21 12:04:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 393. [2023-12-21 12:04:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.683673469387755) internal successors, (660), 392 states have internal predecessors, (660), 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) [2023-12-21 12:04:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 660 transitions. [2023-12-21 12:04:18,284 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 660 transitions. Word has length 119 [2023-12-21 12:04:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:18,287 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 660 transitions. [2023-12-21 12:04:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-12-21 12:04:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 660 transitions. [2023-12-21 12:04:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-21 12:04:18,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:18,295 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] [2023-12-21 12:04:18,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 12:04:18,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:18,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1587207086, now seen corresponding path program 1 times [2023-12-21 12:04:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:18,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104507626] [2023-12-21 12:04:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104507626] [2023-12-21 12:04:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104507626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:18,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:18,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189592792] [2023-12-21 12:04:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:18,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:18,416 INFO L87 Difference]: Start difference. First operand 393 states and 660 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-12-21 12:04:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:18,439 INFO L93 Difference]: Finished difference Result 771 states and 1316 transitions. [2023-12-21 12:04:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 122 [2023-12-21 12:04:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:18,455 INFO L225 Difference]: With dead ends: 771 [2023-12-21 12:04:18,455 INFO L226 Difference]: Without dead ends: 572 [2023-12-21 12:04:18,456 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 [2023-12-21 12:04:18,456 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 158 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:18,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 951 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2023-12-21 12:04:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2023-12-21 12:04:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.6984126984126984) internal successors, (963), 567 states have internal predecessors, (963), 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) [2023-12-21 12:04:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 963 transitions. [2023-12-21 12:04:18,467 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 963 transitions. Word has length 122 [2023-12-21 12:04:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:18,467 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 963 transitions. [2023-12-21 12:04:18,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-12-21 12:04:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 963 transitions. [2023-12-21 12:04:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-21 12:04:18,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:18,475 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] [2023-12-21 12:04:18,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 12:04:18,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:18,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:18,476 INFO L85 PathProgramCache]: Analyzing trace with hash -11270241, now seen corresponding path program 1 times [2023-12-21 12:04:18,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:18,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236124443] [2023-12-21 12:04:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:18,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:18,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236124443] [2023-12-21 12:04:18,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236124443] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:18,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:18,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:18,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010221952] [2023-12-21 12:04:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:18,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:18,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:18,576 INFO L87 Difference]: Start difference. First operand 568 states and 963 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2023-12-21 12:04:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:18,605 INFO L93 Difference]: Finished difference Result 1276 states and 2189 transitions. [2023-12-21 12:04:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 125 [2023-12-21 12:04:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:18,611 INFO L225 Difference]: With dead ends: 1276 [2023-12-21 12:04:18,611 INFO L226 Difference]: Without dead ends: 902 [2023-12-21 12:04:18,611 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 [2023-12-21 12:04:18,613 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 151 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:18,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 952 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2023-12-21 12:04:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 896. [2023-12-21 12:04:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.706145251396648) internal successors, (1527), 895 states have internal predecessors, (1527), 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) [2023-12-21 12:04:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1527 transitions. [2023-12-21 12:04:18,635 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1527 transitions. Word has length 125 [2023-12-21 12:04:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:18,636 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1527 transitions. [2023-12-21 12:04:18,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2023-12-21 12:04:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1527 transitions. [2023-12-21 12:04:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-21 12:04:18,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:18,638 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] [2023-12-21 12:04:18,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 12:04:18,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:18,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash -445983774, now seen corresponding path program 1 times [2023-12-21 12:04:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:18,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310520468] [2023-12-21 12:04:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:18,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:18,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:18,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310520468] [2023-12-21 12:04:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310520468] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:18,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642789607] [2023-12-21 12:04:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:18,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:18,749 INFO L87 Difference]: Start difference. First operand 896 states and 1527 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-12-21 12:04:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:18,790 INFO L93 Difference]: Finished difference Result 2220 states and 3809 transitions. [2023-12-21 12:04:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 128 [2023-12-21 12:04:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:18,796 INFO L225 Difference]: With dead ends: 2220 [2023-12-21 12:04:18,796 INFO L226 Difference]: Without dead ends: 1518 [2023-12-21 12:04:18,797 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 [2023-12-21 12:04:18,799 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 144 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:18,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 953 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2023-12-21 12:04:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1508. [2023-12-21 12:04:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 1.7060384870603849) internal successors, (2571), 1507 states have internal predecessors, (2571), 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) [2023-12-21 12:04:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 2571 transitions. [2023-12-21 12:04:18,845 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 2571 transitions. Word has length 128 [2023-12-21 12:04:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:18,846 INFO L495 AbstractCegarLoop]: Abstraction has 1508 states and 2571 transitions. [2023-12-21 12:04:18,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-12-21 12:04:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 2571 transitions. [2023-12-21 12:04:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-21 12:04:18,848 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:18,848 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] [2023-12-21 12:04:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-21 12:04:18,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:18,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1318801555, now seen corresponding path program 1 times [2023-12-21 12:04:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:18,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878495762] [2023-12-21 12:04:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878495762] [2023-12-21 12:04:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878495762] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:04:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959775307] [2023-12-21 12:04:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:04:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:04:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:04:19,033 INFO L87 Difference]: Start difference. First operand 1508 states and 2571 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2023-12-21 12:04:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:19,255 INFO L93 Difference]: Finished difference Result 7704 states and 13323 transitions. [2023-12-21 12:04:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 12:04:19,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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 131 [2023-12-21 12:04:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:19,276 INFO L225 Difference]: With dead ends: 7704 [2023-12-21 12:04:19,276 INFO L226 Difference]: Without dead ends: 6390 [2023-12-21 12:04:19,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-21 12:04:19,281 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 1749 mSDsluCounter, 2973 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 3465 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:19,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 3465 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:04:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2023-12-21 12:04:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2733. [2023-12-21 12:04:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 1.7104685212298683) internal successors, (4673), 2732 states have internal predecessors, (4673), 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) [2023-12-21 12:04:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 4673 transitions. [2023-12-21 12:04:19,377 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 4673 transitions. Word has length 131 [2023-12-21 12:04:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:19,377 INFO L495 AbstractCegarLoop]: Abstraction has 2733 states and 4673 transitions. [2023-12-21 12:04:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2023-12-21 12:04:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 4673 transitions. [2023-12-21 12:04:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-21 12:04:19,379 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:19,379 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] [2023-12-21 12:04:19,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-21 12:04:19,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:19,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2135028336, now seen corresponding path program 1 times [2023-12-21 12:04:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:19,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146924151] [2023-12-21 12:04:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146924151] [2023-12-21 12:04:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146924151] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:19,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:04:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899530263] [2023-12-21 12:04:19,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:04:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:04:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:19,494 INFO L87 Difference]: Start difference. First operand 2733 states and 4673 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2023-12-21 12:04:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:19,638 INFO L93 Difference]: Finished difference Result 7964 states and 13730 transitions. [2023-12-21 12:04:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:04:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 132 [2023-12-21 12:04:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:19,654 INFO L225 Difference]: With dead ends: 7964 [2023-12-21 12:04:19,654 INFO L226 Difference]: Without dead ends: 5425 [2023-12-21 12:04:19,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 12:04:19,661 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 543 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:19,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1478 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2023-12-21 12:04:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 4062. [2023-12-21 12:04:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 4061 states have (on average 1.7141098251662152) internal successors, (6961), 4061 states have internal predecessors, (6961), 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) [2023-12-21 12:04:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6961 transitions. [2023-12-21 12:04:19,779 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6961 transitions. Word has length 132 [2023-12-21 12:04:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:19,779 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 6961 transitions. [2023-12-21 12:04:19,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2023-12-21 12:04:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6961 transitions. [2023-12-21 12:04:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-21 12:04:19,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:19,781 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] [2023-12-21 12:04:19,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-21 12:04:19,782 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:19,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1824120804, now seen corresponding path program 1 times [2023-12-21 12:04:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852777514] [2023-12-21 12:04:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:19,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852777514] [2023-12-21 12:04:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852777514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:19,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:19,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:04:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502813390] [2023-12-21 12:04:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:19,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:04:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:04:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:19,907 INFO L87 Difference]: Start difference. First operand 4062 states and 6961 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2023-12-21 12:04:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:20,040 INFO L93 Difference]: Finished difference Result 11894 states and 20466 transitions. [2023-12-21 12:04:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:04:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2023-12-21 12:04:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:20,079 INFO L225 Difference]: With dead ends: 11894 [2023-12-21 12:04:20,079 INFO L226 Difference]: Without dead ends: 8026 [2023-12-21 12:04:20,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 12:04:20,090 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 541 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:20,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1607 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2023-12-21 12:04:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6020. [2023-12-21 12:04:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 6019 states have (on average 1.7114138561222794) internal successors, (10301), 6019 states have internal predecessors, (10301), 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) [2023-12-21 12:04:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 10301 transitions. [2023-12-21 12:04:20,302 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 10301 transitions. Word has length 133 [2023-12-21 12:04:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:20,302 INFO L495 AbstractCegarLoop]: Abstraction has 6020 states and 10301 transitions. [2023-12-21 12:04:20,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2023-12-21 12:04:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 10301 transitions. [2023-12-21 12:04:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-21 12:04:20,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:20,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 12:04:20,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-21 12:04:20,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:20,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash -770470151, now seen corresponding path program 1 times [2023-12-21 12:04:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:20,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606644268] [2023-12-21 12:04:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:20,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:20,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:20,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606644268] [2023-12-21 12:04:20,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606644268] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:20,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:20,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:04:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419283680] [2023-12-21 12:04:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:20,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:04:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:04:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:20,413 INFO L87 Difference]: Start difference. First operand 6020 states and 10301 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2023-12-21 12:04:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:20,588 INFO L93 Difference]: Finished difference Result 17710 states and 30410 transitions. [2023-12-21 12:04:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:04:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134 [2023-12-21 12:04:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:20,610 INFO L225 Difference]: With dead ends: 17710 [2023-12-21 12:04:20,611 INFO L226 Difference]: Without dead ends: 11884 [2023-12-21 12:04:20,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 12:04:20,623 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 539 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:20,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1616 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:20,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11884 states. [2023-12-21 12:04:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11884 to 8918. [2023-12-21 12:04:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 1.708309969720758) internal successors, (15233), 8917 states have internal predecessors, (15233), 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) [2023-12-21 12:04:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 15233 transitions. [2023-12-21 12:04:20,868 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 15233 transitions. Word has length 134 [2023-12-21 12:04:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:20,869 INFO L495 AbstractCegarLoop]: Abstraction has 8918 states and 15233 transitions. [2023-12-21 12:04:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2023-12-21 12:04:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 15233 transitions. [2023-12-21 12:04:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-21 12:04:20,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:20,872 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] [2023-12-21 12:04:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-21 12:04:20,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:20,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1324148635, now seen corresponding path program 1 times [2023-12-21 12:04:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108119081] [2023-12-21 12:04:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108119081] [2023-12-21 12:04:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108119081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:21,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:21,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991132395] [2023-12-21 12:04:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:21,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:21,011 INFO L87 Difference]: Start difference. First operand 8918 states and 15233 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:21,150 INFO L93 Difference]: Finished difference Result 20042 states and 34224 transitions. [2023-12-21 12:04:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 135 [2023-12-21 12:04:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:21,179 INFO L225 Difference]: With dead ends: 20042 [2023-12-21 12:04:21,179 INFO L226 Difference]: Without dead ends: 13882 [2023-12-21 12:04:21,192 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 [2023-12-21 12:04:21,193 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 150 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:21,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1044 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13882 states. [2023-12-21 12:04:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13882 to 13880. [2023-12-21 12:04:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13880 states, 13879 states have (on average 1.697816845594063) internal successors, (23564), 13879 states have internal predecessors, (23564), 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) [2023-12-21 12:04:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13880 states to 13880 states and 23564 transitions. [2023-12-21 12:04:21,489 INFO L78 Accepts]: Start accepts. Automaton has 13880 states and 23564 transitions. Word has length 135 [2023-12-21 12:04:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:21,490 INFO L495 AbstractCegarLoop]: Abstraction has 13880 states and 23564 transitions. [2023-12-21 12:04:21,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 13880 states and 23564 transitions. [2023-12-21 12:04:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-21 12:04:21,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:21,492 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] [2023-12-21 12:04:21,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-21 12:04:21,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:21,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:21,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1589484159, now seen corresponding path program 1 times [2023-12-21 12:04:21,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:21,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035369145] [2023-12-21 12:04:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:21,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:21,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035369145] [2023-12-21 12:04:21,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035369145] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:21,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371388710] [2023-12-21 12:04:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:21,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:21,615 INFO L87 Difference]: Start difference. First operand 13880 states and 23564 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:21,804 INFO L93 Difference]: Finished difference Result 27586 states and 46858 transitions. [2023-12-21 12:04:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 135 [2023-12-21 12:04:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:21,843 INFO L225 Difference]: With dead ends: 27586 [2023-12-21 12:04:21,844 INFO L226 Difference]: Without dead ends: 19896 [2023-12-21 12:04:21,859 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 [2023-12-21 12:04:21,860 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 143 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:21,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1030 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19896 states. [2023-12-21 12:04:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19896 to 19894. [2023-12-21 12:04:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19894 states, 19893 states have (on average 1.6889358065651234) internal successors, (33598), 19893 states have internal predecessors, (33598), 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) [2023-12-21 12:04:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19894 states to 19894 states and 33598 transitions. [2023-12-21 12:04:22,418 INFO L78 Accepts]: Start accepts. Automaton has 19894 states and 33598 transitions. Word has length 135 [2023-12-21 12:04:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:22,418 INFO L495 AbstractCegarLoop]: Abstraction has 19894 states and 33598 transitions. [2023-12-21 12:04:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 19894 states and 33598 transitions. [2023-12-21 12:04:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-21 12:04:22,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:22,422 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] [2023-12-21 12:04:22,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-21 12:04:22,422 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:22,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1833380773, now seen corresponding path program 1 times [2023-12-21 12:04:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:22,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083500166] [2023-12-21 12:04:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:22,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:22,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083500166] [2023-12-21 12:04:22,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083500166] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:22,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:22,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:04:22,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056280871] [2023-12-21 12:04:22,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:22,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:04:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:04:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:22,539 INFO L87 Difference]: Start difference. First operand 19894 states and 33598 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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) [2023-12-21 12:04:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:23,097 INFO L93 Difference]: Finished difference Result 63080 states and 106771 transitions. [2023-12-21 12:04:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:04:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 135 [2023-12-21 12:04:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:23,206 INFO L225 Difference]: With dead ends: 63080 [2023-12-21 12:04:23,206 INFO L226 Difference]: Without dead ends: 43666 [2023-12-21 12:04:23,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 12:04:23,311 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 537 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:23,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1609 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43666 states. [2023-12-21 12:04:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43666 to 31700. [2023-12-21 12:04:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31700 states, 31699 states have (on average 1.6837755134231365) internal successors, (53374), 31699 states have internal predecessors, (53374), 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) [2023-12-21 12:04:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31700 states to 31700 states and 53374 transitions. [2023-12-21 12:04:24,322 INFO L78 Accepts]: Start accepts. Automaton has 31700 states and 53374 transitions. Word has length 135 [2023-12-21 12:04:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:24,322 INFO L495 AbstractCegarLoop]: Abstraction has 31700 states and 53374 transitions. [2023-12-21 12:04:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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) [2023-12-21 12:04:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 31700 states and 53374 transitions. [2023-12-21 12:04:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-21 12:04:24,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:24,325 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] [2023-12-21 12:04:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-21 12:04:24,326 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:24,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1291984129, now seen corresponding path program 1 times [2023-12-21 12:04:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721603239] [2023-12-21 12:04:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:24,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:24,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:24,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721603239] [2023-12-21 12:04:24,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721603239] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:24,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:24,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745630051] [2023-12-21 12:04:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:24,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:24,407 INFO L87 Difference]: Start difference. First operand 31700 states and 53374 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:25,086 INFO L93 Difference]: Finished difference Result 70564 states and 118760 transitions. [2023-12-21 12:04:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:25,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 135 [2023-12-21 12:04:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:25,223 INFO L225 Difference]: With dead ends: 70564 [2023-12-21 12:04:25,223 INFO L226 Difference]: Without dead ends: 48204 [2023-12-21 12:04:25,265 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 [2023-12-21 12:04:25,266 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 157 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:25,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1080 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48204 states. [2023-12-21 12:04:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48204 to 48202. [2023-12-21 12:04:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48202 states, 48201 states have (on average 1.6715420841891246) internal successors, (80570), 48201 states have internal predecessors, (80570), 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) [2023-12-21 12:04:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48202 states to 48202 states and 80570 transitions. [2023-12-21 12:04:26,418 INFO L78 Accepts]: Start accepts. Automaton has 48202 states and 80570 transitions. Word has length 135 [2023-12-21 12:04:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:26,418 INFO L495 AbstractCegarLoop]: Abstraction has 48202 states and 80570 transitions. [2023-12-21 12:04:26,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 48202 states and 80570 transitions. [2023-12-21 12:04:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-21 12:04:26,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:26,420 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] [2023-12-21 12:04:26,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-21 12:04:26,420 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:26,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash 136179941, now seen corresponding path program 1 times [2023-12-21 12:04:26,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:26,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315494564] [2023-12-21 12:04:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315494564] [2023-12-21 12:04:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315494564] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:26,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:04:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484353696] [2023-12-21 12:04:26,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:26,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:04:26,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:04:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:04:26,649 INFO L87 Difference]: Start difference. First operand 48202 states and 80570 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:27,644 INFO L93 Difference]: Finished difference Result 108381 states and 181956 transitions. [2023-12-21 12:04:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:04:27,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 135 [2023-12-21 12:04:27,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:27,951 INFO L225 Difference]: With dead ends: 108381 [2023-12-21 12:04:27,952 INFO L226 Difference]: Without dead ends: 73593 [2023-12-21 12:04:28,014 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 [2023-12-21 12:04:28,014 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 164 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:28,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1108 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73593 states. [2023-12-21 12:04:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73593 to 73591. [2023-12-21 12:04:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73591 states, 73590 states have (on average 1.6629025682837342) internal successors, (122373), 73590 states have internal predecessors, (122373), 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) [2023-12-21 12:04:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73591 states to 73591 states and 122373 transitions. [2023-12-21 12:04:29,867 INFO L78 Accepts]: Start accepts. Automaton has 73591 states and 122373 transitions. Word has length 135 [2023-12-21 12:04:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 73591 states and 122373 transitions. [2023-12-21 12:04:29,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-12-21 12:04:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 73591 states and 122373 transitions. [2023-12-21 12:04:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-21 12:04:29,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:29,869 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] [2023-12-21 12:04:29,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-21 12:04:29,870 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:29,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash -534970547, now seen corresponding path program 1 times [2023-12-21 12:04:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:29,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063008813] [2023-12-21 12:04:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:29,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:30,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063008813] [2023-12-21 12:04:30,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063008813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:30,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:30,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:04:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386823532] [2023-12-21 12:04:30,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:30,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:04:30,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:04:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:04:30,120 INFO L87 Difference]: Start difference. First operand 73591 states and 122373 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2023-12-21 12:04:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:31,286 INFO L93 Difference]: Finished difference Result 146958 states and 244383 transitions. [2023-12-21 12:04:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 12:04:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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 137 [2023-12-21 12:04:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:31,478 INFO L225 Difference]: With dead ends: 146958 [2023-12-21 12:04:31,478 INFO L226 Difference]: Without dead ends: 73593 [2023-12-21 12:04:31,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-12-21 12:04:31,537 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 149 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:31,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 2348 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:04:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73593 states. [2023-12-21 12:04:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73593 to 73591. [2023-12-21 12:04:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73591 states, 73590 states have (on average 1.6544095665171898) internal successors, (121748), 73590 states have internal predecessors, (121748), 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) [2023-12-21 12:04:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73591 states to 73591 states and 121748 transitions. [2023-12-21 12:04:33,130 INFO L78 Accepts]: Start accepts. Automaton has 73591 states and 121748 transitions. Word has length 137 [2023-12-21 12:04:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:33,131 INFO L495 AbstractCegarLoop]: Abstraction has 73591 states and 121748 transitions. [2023-12-21 12:04:33,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2023-12-21 12:04:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 73591 states and 121748 transitions. [2023-12-21 12:04:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-21 12:04:33,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:33,149 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] [2023-12-21 12:04:33,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-21 12:04:33,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:33,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -180174314, now seen corresponding path program 1 times [2023-12-21 12:04:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370133998] [2023-12-21 12:04:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:33,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:33,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370133998] [2023-12-21 12:04:33,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370133998] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:33,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:33,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:04:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244436799] [2023-12-21 12:04:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:33,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:04:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:04:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:04:33,605 INFO L87 Difference]: Start difference. First operand 73591 states and 121748 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2023-12-21 12:04:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:35,315 INFO L93 Difference]: Finished difference Result 215228 states and 356507 transitions. [2023-12-21 12:04:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 12:04:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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 140 [2023-12-21 12:04:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:35,586 INFO L225 Difference]: With dead ends: 215228 [2023-12-21 12:04:35,586 INFO L226 Difference]: Without dead ends: 141863 [2023-12-21 12:04:35,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-12-21 12:04:35,647 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 147 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:35,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 2363 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141863 states. [2023-12-21 12:04:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141863 to 141861. [2023-12-21 12:04:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141861 states, 141860 states have (on average 1.6432045678838292) internal successors, (233105), 141860 states have internal predecessors, (233105), 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) [2023-12-21 12:04:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141861 states to 141861 states and 233105 transitions. [2023-12-21 12:04:38,902 INFO L78 Accepts]: Start accepts. Automaton has 141861 states and 233105 transitions. Word has length 140 [2023-12-21 12:04:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:38,902 INFO L495 AbstractCegarLoop]: Abstraction has 141861 states and 233105 transitions. [2023-12-21 12:04:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2023-12-21 12:04:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 141861 states and 233105 transitions. [2023-12-21 12:04:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-21 12:04:38,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:38,903 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] [2023-12-21 12:04:38,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-21 12:04:38,904 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:38,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1304986428, now seen corresponding path program 1 times [2023-12-21 12:04:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:38,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675250763] [2023-12-21 12:04:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 12:04:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:39,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675250763] [2023-12-21 12:04:39,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675250763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:39,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:39,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:04:39,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410857894] [2023-12-21 12:04:39,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:39,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:04:39,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:04:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:39,432 INFO L87 Difference]: Start difference. First operand 141861 states and 233105 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-12-21 12:04:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:40,742 INFO L93 Difference]: Finished difference Result 147671 states and 240850 transitions. [2023-12-21 12:04:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:04:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 141 [2023-12-21 12:04:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:41,034 INFO L225 Difference]: With dead ends: 147671 [2023-12-21 12:04:41,034 INFO L226 Difference]: Without dead ends: 147669 [2023-12-21 12:04:41,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:04:41,083 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 1 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:41,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1480 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:04:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147669 states. [2023-12-21 12:04:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147669 to 145733. [2023-12-21 12:04:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145733 states, 145732 states have (on average 1.6259297889276205) internal successors, (236950), 145732 states have internal predecessors, (236950), 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) [2023-12-21 12:04:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145733 states to 145733 states and 236950 transitions. [2023-12-21 12:04:44,339 INFO L78 Accepts]: Start accepts. Automaton has 145733 states and 236950 transitions. Word has length 141 [2023-12-21 12:04:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:44,340 INFO L495 AbstractCegarLoop]: Abstraction has 145733 states and 236950 transitions. [2023-12-21 12:04:44,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-12-21 12:04:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 145733 states and 236950 transitions. [2023-12-21 12:04:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-21 12:04:44,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:44,344 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] [2023-12-21 12:04:44,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-21 12:04:44,344 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:44,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -785799495, now seen corresponding path program 1 times [2023-12-21 12:04:44,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:44,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050449695] [2023-12-21 12:04:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:44,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 12:04:44,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:44,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050449695] [2023-12-21 12:04:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050449695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:44,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:44,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:04:44,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160106447] [2023-12-21 12:04:44,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:44,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:04:44,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:04:44,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:04:44,495 INFO L87 Difference]: Start difference. First operand 145733 states and 236950 transitions. Second operand has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 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) [2023-12-21 12:04:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:47,993 INFO L93 Difference]: Finished difference Result 400383 states and 652747 transitions. [2023-12-21 12:04:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 12:04:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 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 178 [2023-12-21 12:04:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:04:48,718 INFO L225 Difference]: With dead ends: 400383 [2023-12-21 12:04:48,719 INFO L226 Difference]: Without dead ends: 335731 [2023-12-21 12:04:48,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 12:04:48,842 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 1174 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:04:48,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1174 Valid, 2439 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:04:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335731 states. [2023-12-21 12:04:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335731 to 234849. [2023-12-21 12:04:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234849 states, 234848 states have (on average 1.623313802970432) internal successors, (381232), 234848 states have internal predecessors, (381232), 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) [2023-12-21 12:04:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234849 states to 234849 states and 381232 transitions. [2023-12-21 12:04:55,171 INFO L78 Accepts]: Start accepts. Automaton has 234849 states and 381232 transitions. Word has length 178 [2023-12-21 12:04:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:04:55,172 INFO L495 AbstractCegarLoop]: Abstraction has 234849 states and 381232 transitions. [2023-12-21 12:04:55,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 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) [2023-12-21 12:04:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 234849 states and 381232 transitions. [2023-12-21 12:04:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-21 12:04:55,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:04:55,176 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] [2023-12-21 12:04:55,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-21 12:04:55,176 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:04:55,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:04:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1051135019, now seen corresponding path program 1 times [2023-12-21 12:04:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:04:55,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506515558] [2023-12-21 12:04:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:04:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:04:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:04:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 12:04:55,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:04:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506515558] [2023-12-21 12:04:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506515558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:04:55,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:04:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:04:55,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046026995] [2023-12-21 12:04:55,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:04:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:04:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:04:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:04:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:04:55,340 INFO L87 Difference]: Start difference. First operand 234849 states and 381232 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2023-12-21 12:04:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:04:59,257 INFO L93 Difference]: Finished difference Result 426403 states and 695167 transitions. [2023-12-21 12:04:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 12:04:59,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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 178 [2023-12-21 12:04:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:05:00,374 INFO L225 Difference]: With dead ends: 426403 [2023-12-21 12:05:00,374 INFO L226 Difference]: Without dead ends: 361751 [2023-12-21 12:05:00,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 12:05:00,491 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 1157 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:05:00,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 2461 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:05:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361751 states. [2023-12-21 12:05:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361751 to 318423. [2023-12-21 12:05:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318423 states, 318422 states have (on average 1.6239267387303642) internal successors, (517094), 318422 states have internal predecessors, (517094), 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) [2023-12-21 12:05:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318423 states to 318423 states and 517094 transitions. [2023-12-21 12:05:08,062 INFO L78 Accepts]: Start accepts. Automaton has 318423 states and 517094 transitions. Word has length 178 [2023-12-21 12:05:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:05:08,063 INFO L495 AbstractCegarLoop]: Abstraction has 318423 states and 517094 transitions. [2023-12-21 12:05:08,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2023-12-21 12:05:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 318423 states and 517094 transitions. [2023-12-21 12:05:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-21 12:05:08,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:05:08,087 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] [2023-12-21 12:05:08,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-21 12:05:08,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:05:08,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:05:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1830333269, now seen corresponding path program 1 times [2023-12-21 12:05:08,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:05:08,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609692838] [2023-12-21 12:05:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:05:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:05:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:05:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 12:05:08,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:05:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609692838] [2023-12-21 12:05:08,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609692838] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:05:08,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:05:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:05:08,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158826018] [2023-12-21 12:05:08,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:05:08,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:05:08,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:05:08,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:05:08,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:05:08,318 INFO L87 Difference]: Start difference. First operand 318423 states and 517094 transitions. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 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) [2023-12-21 12:05:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:05:12,824 INFO L93 Difference]: Finished difference Result 467971 states and 763099 transitions. [2023-12-21 12:05:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 12:05:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 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 178 [2023-12-21 12:05:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:05:14,032 INFO L225 Difference]: With dead ends: 467971 [2023-12-21 12:05:14,033 INFO L226 Difference]: Without dead ends: 403319 [2023-12-21 12:05:14,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 12:05:14,150 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 1083 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:05:14,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 2648 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:05:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403319 states. [2023-12-21 12:05:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403319 to 369447. [2023-12-21 12:05:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369447 states, 369446 states have (on average 1.625422930550067) internal successors, (600506), 369446 states have internal predecessors, (600506), 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) [2023-12-21 12:05:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369447 states to 369447 states and 600506 transitions. [2023-12-21 12:05:22,662 INFO L78 Accepts]: Start accepts. Automaton has 369447 states and 600506 transitions. Word has length 178 [2023-12-21 12:05:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:05:22,663 INFO L495 AbstractCegarLoop]: Abstraction has 369447 states and 600506 transitions. [2023-12-21 12:05:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 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) [2023-12-21 12:05:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 369447 states and 600506 transitions. [2023-12-21 12:05:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-21 12:05:22,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:05:22,667 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] [2023-12-21 12:05:22,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-21 12:05:22,668 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:05:22,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:05:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash 674529081, now seen corresponding path program 1 times [2023-12-21 12:05:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:05:22,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283268021] [2023-12-21 12:05:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:05:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:05:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:05:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 12:05:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:05:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283268021] [2023-12-21 12:05:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283268021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:05:23,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:05:23,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 12:05:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044935845] [2023-12-21 12:05:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:05:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 12:05:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:05:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 12:05:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 12:05:23,211 INFO L87 Difference]: Start difference. First operand 369447 states and 600506 transitions. Second operand has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 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) [2023-12-21 12:05:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:05:27,814 INFO L93 Difference]: Finished difference Result 520881 states and 850119 transitions. [2023-12-21 12:05:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 12:05:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 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 178 [2023-12-21 12:05:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:05:29,116 INFO L225 Difference]: With dead ends: 520881 [2023-12-21 12:05:29,116 INFO L226 Difference]: Without dead ends: 455079 [2023-12-21 12:05:29,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 12:05:29,241 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 1077 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 12:05:29,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 2585 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 12:05:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455079 states. [2023-12-21 12:05:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455079 to 421207. [2023-12-21 12:05:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421207 states, 421206 states have (on average 1.627056594635404) internal successors, (685326), 421206 states have internal predecessors, (685326), 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) [2023-12-21 12:05:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421207 states to 421207 states and 685326 transitions. [2023-12-21 12:05:38,894 INFO L78 Accepts]: Start accepts. Automaton has 421207 states and 685326 transitions. Word has length 178 [2023-12-21 12:05:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:05:38,894 INFO L495 AbstractCegarLoop]: Abstraction has 421207 states and 685326 transitions. [2023-12-21 12:05:38,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 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) [2023-12-21 12:05:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 421207 states and 685326 transitions. [2023-12-21 12:05:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-12-21 12:05:38,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:05:38,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 12:05:38,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-21 12:05:38,908 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:05:38,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:05:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 753564844, now seen corresponding path program 1 times [2023-12-21 12:05:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:05:38,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547329030] [2023-12-21 12:05:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:05:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:05:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:05:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 12:05:39,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:05:39,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547329030] [2023-12-21 12:05:39,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547329030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:05:39,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:05:39,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 12:05:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343901988] [2023-12-21 12:05:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:05:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 12:05:39,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:05:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 12:05:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 12:05:39,518 INFO L87 Difference]: Start difference. First operand 421207 states and 685326 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-12-21 12:05:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:05:47,486 INFO L93 Difference]: Finished difference Result 900717 states and 1469955 transitions. [2023-12-21 12:05:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 12:05:47,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 179 [2023-12-21 12:05:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:05:49,039 INFO L225 Difference]: With dead ends: 900717 [2023-12-21 12:05:49,040 INFO L226 Difference]: Without dead ends: 670815 [2023-12-21 12:05:49,284 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 [2023-12-21 12:05:49,285 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 133 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:05:49,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 952 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:05:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670815 states. [2023-12-21 12:06:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670815 to 669544. [2023-12-21 12:06:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669544 states, 669543 states have (on average 1.628123959178126) internal successors, (1090099), 669543 states have internal predecessors, (1090099), 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) [2023-12-21 12:06:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669544 states to 669544 states and 1090099 transitions. [2023-12-21 12:06:06,282 INFO L78 Accepts]: Start accepts. Automaton has 669544 states and 1090099 transitions. Word has length 179 [2023-12-21 12:06:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:06:06,282 INFO L495 AbstractCegarLoop]: Abstraction has 669544 states and 1090099 transitions. [2023-12-21 12:06:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-12-21 12:06:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 669544 states and 1090099 transitions. [2023-12-21 12:06:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-12-21 12:06:06,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:06:06,286 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 12:06:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-21 12:06:06,286 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:06:06,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:06:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -632638550, now seen corresponding path program 1 times [2023-12-21 12:06:06,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:06:06,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597974521] [2023-12-21 12:06:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:06:06,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:06:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:06:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 12:06:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:06:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597974521] [2023-12-21 12:06:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597974521] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:06:06,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:06:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:06:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462509996] [2023-12-21 12:06:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:06:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:06:06,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:06:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:06:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:06:06,399 INFO L87 Difference]: Start difference. First operand 669544 states and 1090099 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2023-12-21 12:06:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:06:17,350 INFO L93 Difference]: Finished difference Result 1126303 states and 1838416 transitions. [2023-12-21 12:06:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:06:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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 179 [2023-12-21 12:06:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:06:20,849 INFO L225 Difference]: With dead ends: 1126303 [2023-12-21 12:06:20,850 INFO L226 Difference]: Without dead ends: 891627 [2023-12-21 12:06:21,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:06:21,159 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 298 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:06:21,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1332 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:06:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891627 states. [2023-12-21 12:06:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891627 to 844596. [2023-12-21 12:06:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844596 states, 844595 states have (on average 1.6263842433355633) internal successors, (1373636), 844595 states have internal predecessors, (1373636), 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) [2023-12-21 12:06:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844596 states to 844596 states and 1373636 transitions. [2023-12-21 12:06:42,668 INFO L78 Accepts]: Start accepts. Automaton has 844596 states and 1373636 transitions. Word has length 179 [2023-12-21 12:06:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 12:06:42,669 INFO L495 AbstractCegarLoop]: Abstraction has 844596 states and 1373636 transitions. [2023-12-21 12:06:42,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2023-12-21 12:06:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 844596 states and 1373636 transitions. [2023-12-21 12:06:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-12-21 12:06:42,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 12:06:42,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 12:06:42,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-21 12:06:42,674 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 12:06:42,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 12:06:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash 131584606, now seen corresponding path program 1 times [2023-12-21 12:06:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 12:06:42,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167676844] [2023-12-21 12:06:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 12:06:42,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 12:06:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 12:06:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 12:06:43,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 12:06:43,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167676844] [2023-12-21 12:06:43,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167676844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 12:06:43,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 12:06:43,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 12:06:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269975024] [2023-12-21 12:06:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 12:06:43,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 12:06:43,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 12:06:43,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 12:06:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:06:43,253 INFO L87 Difference]: Start difference. First operand 844596 states and 1373636 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2023-12-21 12:06:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 12:06:54,663 INFO L93 Difference]: Finished difference Result 1234731 states and 2012961 transitions. [2023-12-21 12:06:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 12:06:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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 180 [2023-12-21 12:06:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 12:06:57,592 INFO L225 Difference]: With dead ends: 1234731 [2023-12-21 12:06:57,592 INFO L226 Difference]: Without dead ends: 1030231 [2023-12-21 12:06:57,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 12:06:57,951 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 306 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 12:06:57,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1330 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 12:06:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030231 states.