/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/systemc/kundu.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 00:34:08,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 00:34:08,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 00:34:08,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 00:34:08,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 00:34:08,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 00:34:08,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 00:34:08,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 00:34:08,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 00:34:08,752 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 00:34:08,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 00:34:08,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 00:34:08,753 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 00:34:08,753 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 00:34:08,754 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 00:34:08,754 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 00:34:08,754 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 00:34:08,754 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 00:34:08,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 00:34:08,755 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 00:34:08,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 00:34:08,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 00:34:08,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 00:34:08,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 00:34:08,756 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 00:34:08,756 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 00:34:08,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 00:34:08,757 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 00:34:08,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 00:34:08,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 00:34:08,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 00:34:08,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 00:34:08,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:34:08,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 00:34:08,759 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 00:34:08,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 00:34:08,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 00:34:08,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-20 00:34:08,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 00:34:08,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 00:34:08,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 00:34:08,921 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 00:34:08,921 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 00:34:08,922 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu.cil.c [2023-12-20 00:34:09,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 00:34:10,108 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 00:34:10,108 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c [2023-12-20 00:34:10,118 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881661055/a63d335467074f62924690f185abf819/FLAG9fe415004 [2023-12-20 00:34:10,132 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881661055/a63d335467074f62924690f185abf819 [2023-12-20 00:34:10,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 00:34:10,135 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 00:34:10,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 00:34:10,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 00:34:10,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 00:34:10,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8bcac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10, skipping insertion in model container [2023-12-20 00:34:10,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,181 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 00:34:10,284 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2023-12-20 00:34:10,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:34:10,342 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 00:34:10,350 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2023-12-20 00:34:10,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:34:10,378 INFO L206 MainTranslator]: Completed translation [2023-12-20 00:34:10,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10 WrapperNode [2023-12-20 00:34:10,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 00:34:10,379 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 00:34:10,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 00:34:10,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 00:34:10,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,418 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 317 [2023-12-20 00:34:10,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 00:34:10,419 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 00:34:10,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 00:34:10,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 00:34:10,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,429 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,438 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-20 00:34:10,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,438 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,447 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,448 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 00:34:10,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 00:34:10,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 00:34:10,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 00:34:10,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (1/1) ... [2023-12-20 00:34:10,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:34:10,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:10,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 00:34:10,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 00:34:10,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 00:34:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2023-12-20 00:34:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2023-12-20 00:34:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-12-20 00:34:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-12-20 00:34:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-20 00:34:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-20 00:34:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-20 00:34:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-20 00:34:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-20 00:34:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-20 00:34:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-20 00:34:10,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-20 00:34:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 00:34:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-20 00:34:10,516 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-20 00:34:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 00:34:10,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 00:34:10,583 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 00:34:10,584 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 00:34:10,827 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 00:34:10,865 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 00:34:10,865 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-20 00:34:10,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:34:10 BoogieIcfgContainer [2023-12-20 00:34:10,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 00:34:10,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 00:34:10,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 00:34:10,888 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 00:34:10,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 12:34:10" (1/3) ... [2023-12-20 00:34:10,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a53556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:34:10, skipping insertion in model container [2023-12-20 00:34:10,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:34:10" (2/3) ... [2023-12-20 00:34:10,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a53556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:34:10, skipping insertion in model container [2023-12-20 00:34:10,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:34:10" (3/3) ... [2023-12-20 00:34:10,890 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2023-12-20 00:34:10,903 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 00:34:10,903 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 00:34:10,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 00:34:10,940 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;@680640b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 00:34:10,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 00:34:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 100 states have internal predecessors, (152), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-20 00:34:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:34:10,951 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:10,951 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] [2023-12-20 00:34:10,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:10,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1531733126, now seen corresponding path program 1 times [2023-12-20 00:34:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247526180] [2023-12-20 00:34:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:34:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:34:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:11,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:11,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247526180] [2023-12-20 00:34:11,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247526180] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:11,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:11,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 00:34:11,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91838104] [2023-12-20 00:34:11,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 00:34:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 00:34:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 00:34:11,172 INFO L87 Difference]: Start difference. First operand has 123 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 100 states have internal predecessors, (152), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:11,361 INFO L93 Difference]: Finished difference Result 256 states and 398 transitions. [2023-12-20 00:34:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 00:34:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-20 00:34:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:11,374 INFO L225 Difference]: With dead ends: 256 [2023-12-20 00:34:11,374 INFO L226 Difference]: Without dead ends: 135 [2023-12-20 00:34:11,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:11,382 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 208 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:11,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 262 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-20 00:34:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2023-12-20 00:34:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 97 states have internal predecessors, (140), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-20 00:34:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 173 transitions. [2023-12-20 00:34:11,437 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 173 transitions. Word has length 52 [2023-12-20 00:34:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:11,438 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 173 transitions. [2023-12-20 00:34:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 173 transitions. [2023-12-20 00:34:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:34:11,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:11,442 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] [2023-12-20 00:34:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 00:34:11,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:11,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1884821508, now seen corresponding path program 1 times [2023-12-20 00:34:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523995507] [2023-12-20 00:34:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:34:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:34:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523995507] [2023-12-20 00:34:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523995507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:11,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:11,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:11,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048969179] [2023-12-20 00:34:11,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:11,611 INFO L87 Difference]: Start difference. First operand 119 states and 173 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:11,846 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2023-12-20 00:34:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:34:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-20 00:34:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:11,848 INFO L225 Difference]: With dead ends: 368 [2023-12-20 00:34:11,849 INFO L226 Difference]: Without dead ends: 258 [2023-12-20 00:34:11,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:11,851 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 370 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:11,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 730 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:34:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-20 00:34:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2023-12-20 00:34:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 182 states have internal predecessors, (263), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-20 00:34:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 318 transitions. [2023-12-20 00:34:11,904 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 318 transitions. Word has length 52 [2023-12-20 00:34:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:11,905 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 318 transitions. [2023-12-20 00:34:11,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 318 transitions. [2023-12-20 00:34:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:34:11,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:11,911 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] [2023-12-20 00:34:11,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 00:34:11,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:11,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1886825117, now seen corresponding path program 1 times [2023-12-20 00:34:11,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:11,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162823632] [2023-12-20 00:34:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:11,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:34:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:34:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162823632] [2023-12-20 00:34:12,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162823632] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:12,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:12,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456625149] [2023-12-20 00:34:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:12,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:12,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:12,062 INFO L87 Difference]: Start difference. First operand 220 states and 318 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:12,207 INFO L93 Difference]: Finished difference Result 469 states and 693 transitions. [2023-12-20 00:34:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:34:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-20 00:34:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:12,212 INFO L225 Difference]: With dead ends: 469 [2023-12-20 00:34:12,212 INFO L226 Difference]: Without dead ends: 258 [2023-12-20 00:34:12,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:12,215 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 74 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:12,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 550 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-20 00:34:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2023-12-20 00:34:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 180 states have (on average 1.4666666666666666) internal successors, (264), 184 states have internal predecessors, (264), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-20 00:34:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 319 transitions. [2023-12-20 00:34:12,228 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 319 transitions. Word has length 52 [2023-12-20 00:34:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:12,228 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 319 transitions. [2023-12-20 00:34:12,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 319 transitions. [2023-12-20 00:34:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:34:12,229 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:12,229 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] [2023-12-20 00:34:12,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 00:34:12,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:12,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1564136677, now seen corresponding path program 1 times [2023-12-20 00:34:12,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:12,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072708263] [2023-12-20 00:34:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:12,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:34:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:34:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:12,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:12,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072708263] [2023-12-20 00:34:12,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072708263] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:12,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:12,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:34:12,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083164392] [2023-12-20 00:34:12,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:12,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:34:12,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:12,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:34:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:34:12,356 INFO L87 Difference]: Start difference. First operand 222 states and 319 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:12,780 INFO L93 Difference]: Finished difference Result 919 states and 1359 transitions. [2023-12-20 00:34:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:34:12,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-20 00:34:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:12,784 INFO L225 Difference]: With dead ends: 919 [2023-12-20 00:34:12,784 INFO L226 Difference]: Without dead ends: 706 [2023-12-20 00:34:12,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-20 00:34:12,785 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 684 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:12,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 896 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:34:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-12-20 00:34:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 417. [2023-12-20 00:34:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 341 states have (on average 1.4545454545454546) internal successors, (496), 347 states have internal predecessors, (496), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2023-12-20 00:34:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 598 transitions. [2023-12-20 00:34:12,811 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 598 transitions. Word has length 52 [2023-12-20 00:34:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:12,811 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 598 transitions. [2023-12-20 00:34:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 598 transitions. [2023-12-20 00:34:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 00:34:12,815 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:12,815 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] [2023-12-20 00:34:12,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 00:34:12,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:12,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 269686940, now seen corresponding path program 1 times [2023-12-20 00:34:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:12,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559699364] [2023-12-20 00:34:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:12,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:12,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:12,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559699364] [2023-12-20 00:34:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559699364] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:12,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:12,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458685526] [2023-12-20 00:34:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:12,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:12,903 INFO L87 Difference]: Start difference. First operand 417 states and 598 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:13,043 INFO L93 Difference]: Finished difference Result 896 states and 1324 transitions. [2023-12-20 00:34:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 00:34:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-12-20 00:34:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:13,046 INFO L225 Difference]: With dead ends: 896 [2023-12-20 00:34:13,046 INFO L226 Difference]: Without dead ends: 488 [2023-12-20 00:34:13,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:13,048 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 76 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:13,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 527 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-12-20 00:34:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 425. [2023-12-20 00:34:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 349 states have (on average 1.4441260744985673) internal successors, (504), 355 states have internal predecessors, (504), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2023-12-20 00:34:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 606 transitions. [2023-12-20 00:34:13,077 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 606 transitions. Word has length 53 [2023-12-20 00:34:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:13,078 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 606 transitions. [2023-12-20 00:34:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 606 transitions. [2023-12-20 00:34:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 00:34:13,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:13,079 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] [2023-12-20 00:34:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 00:34:13,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:13,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:13,080 INFO L85 PathProgramCache]: Analyzing trace with hash 971286814, now seen corresponding path program 1 times [2023-12-20 00:34:13,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:13,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478447230] [2023-12-20 00:34:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:13,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:13,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:13,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478447230] [2023-12-20 00:34:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478447230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:13,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:13,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:13,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533279530] [2023-12-20 00:34:13,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:13,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:13,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:13,159 INFO L87 Difference]: Start difference. First operand 425 states and 606 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:13,286 INFO L93 Difference]: Finished difference Result 912 states and 1338 transitions. [2023-12-20 00:34:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 00:34:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-12-20 00:34:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:13,289 INFO L225 Difference]: With dead ends: 912 [2023-12-20 00:34:13,289 INFO L226 Difference]: Without dead ends: 496 [2023-12-20 00:34:13,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:13,291 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 54 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:13,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 519 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-12-20 00:34:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 433. [2023-12-20 00:34:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 357 states have (on average 1.4341736694677871) internal successors, (512), 363 states have internal predecessors, (512), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2023-12-20 00:34:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 614 transitions. [2023-12-20 00:34:13,347 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 614 transitions. Word has length 53 [2023-12-20 00:34:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:13,347 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 614 transitions. [2023-12-20 00:34:13,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 00:34:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 614 transitions. [2023-12-20 00:34:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 00:34:13,348 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:13,348 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] [2023-12-20 00:34:13,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 00:34:13,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:13,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1111835424, now seen corresponding path program 1 times [2023-12-20 00:34:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29998247] [2023-12-20 00:34:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:13,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:13,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29998247] [2023-12-20 00:34:13,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29998247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:13,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:13,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:34:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477446777] [2023-12-20 00:34:13,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:13,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:34:13,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:13,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:34:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:34:13,413 INFO L87 Difference]: Start difference. First operand 433 states and 614 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-20 00:34:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:13,626 INFO L93 Difference]: Finished difference Result 1357 states and 1939 transitions. [2023-12-20 00:34:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 00:34:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2023-12-20 00:34:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:13,630 INFO L225 Difference]: With dead ends: 1357 [2023-12-20 00:34:13,630 INFO L226 Difference]: Without dead ends: 934 [2023-12-20 00:34:13,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-12-20 00:34:13,632 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 237 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:13,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 738 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-12-20 00:34:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 808. [2023-12-20 00:34:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 668 states have (on average 1.4251497005988023) internal successors, (952), 682 states have internal predecessors, (952), 91 states have call successors, (91), 49 states have call predecessors, (91), 48 states have return successors, (93), 77 states have call predecessors, (93), 88 states have call successors, (93) [2023-12-20 00:34:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1136 transitions. [2023-12-20 00:34:13,676 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1136 transitions. Word has length 53 [2023-12-20 00:34:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:13,677 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1136 transitions. [2023-12-20 00:34:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-20 00:34:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1136 transitions. [2023-12-20 00:34:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 00:34:13,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:13,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:13,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 00:34:13,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:13,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2095343432, now seen corresponding path program 1 times [2023-12-20 00:34:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:13,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730874721] [2023-12-20 00:34:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:13,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:13,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730874721] [2023-12-20 00:34:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730874721] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:13,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886078058] [2023-12-20 00:34:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:13,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:13,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:13,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 00:34:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:13,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 00:34:13,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:13,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886078058] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:34:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 5] total 8 [2023-12-20 00:34:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209169397] [2023-12-20 00:34:14,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:14,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:34:14,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:34:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:34:14,030 INFO L87 Difference]: Start difference. First operand 808 states and 1136 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 00:34:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:14,242 INFO L93 Difference]: Finished difference Result 2246 states and 3176 transitions. [2023-12-20 00:34:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 00:34:14,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2023-12-20 00:34:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:14,248 INFO L225 Difference]: With dead ends: 2246 [2023-12-20 00:34:14,248 INFO L226 Difference]: Without dead ends: 1539 [2023-12-20 00:34:14,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-20 00:34:14,251 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 281 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:14,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1153 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2023-12-20 00:34:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1510. [2023-12-20 00:34:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1254 states have (on average 1.4218500797448166) internal successors, (1783), 1277 states have internal predecessors, (1783), 165 states have call successors, (165), 91 states have call predecessors, (165), 90 states have return successors, (172), 142 states have call predecessors, (172), 162 states have call successors, (172) [2023-12-20 00:34:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2120 transitions. [2023-12-20 00:34:14,319 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2120 transitions. Word has length 64 [2023-12-20 00:34:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:14,319 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 2120 transitions. [2023-12-20 00:34:14,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 00:34:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2120 transitions. [2023-12-20 00:34:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 00:34:14,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:14,320 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] [2023-12-20 00:34:14,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:14,527 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:14,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash -850655386, now seen corresponding path program 1 times [2023-12-20 00:34:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:14,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661464046] [2023-12-20 00:34:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:14,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661464046] [2023-12-20 00:34:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661464046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:14,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:14,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:34:14,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38767019] [2023-12-20 00:34:14,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:14,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:34:14,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:34:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:34:14,602 INFO L87 Difference]: Start difference. First operand 1510 states and 2120 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:34:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:14,992 INFO L93 Difference]: Finished difference Result 4752 states and 6781 transitions. [2023-12-20 00:34:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 00:34:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-12-20 00:34:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:15,005 INFO L225 Difference]: With dead ends: 4752 [2023-12-20 00:34:15,005 INFO L226 Difference]: Without dead ends: 3252 [2023-12-20 00:34:15,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-20 00:34:15,010 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 352 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:15,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 632 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:34:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2023-12-20 00:34:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2964. [2023-12-20 00:34:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2487 states have (on average 1.403297145154805) internal successors, (3490), 2528 states have internal predecessors, (3490), 292 states have call successors, (292), 170 states have call predecessors, (292), 184 states have return successors, (401), 267 states have call predecessors, (401), 289 states have call successors, (401) [2023-12-20 00:34:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4183 transitions. [2023-12-20 00:34:15,120 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4183 transitions. Word has length 66 [2023-12-20 00:34:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:15,121 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 4183 transitions. [2023-12-20 00:34:15,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:34:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4183 transitions. [2023-12-20 00:34:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 00:34:15,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:15,122 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] [2023-12-20 00:34:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 00:34:15,122 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:15,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -648831452, now seen corresponding path program 1 times [2023-12-20 00:34:15,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:15,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6486441] [2023-12-20 00:34:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:15,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6486441] [2023-12-20 00:34:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6486441] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801969953] [2023-12-20 00:34:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:15,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:15,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:15,157 INFO L87 Difference]: Start difference. First operand 2964 states and 4183 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:34:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:15,420 INFO L93 Difference]: Finished difference Result 6225 states and 8823 transitions. [2023-12-20 00:34:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:34:15,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-12-20 00:34:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:15,430 INFO L225 Difference]: With dead ends: 6225 [2023-12-20 00:34:15,430 INFO L226 Difference]: Without dead ends: 3270 [2023-12-20 00:34:15,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:34:15,436 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 287 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:15,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 266 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2023-12-20 00:34:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 2959. [2023-12-20 00:34:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2485 states have (on average 1.4028169014084506) internal successors, (3486), 2525 states have internal predecessors, (3486), 289 states have call successors, (289), 170 states have call predecessors, (289), 184 states have return successors, (397), 264 states have call predecessors, (397), 286 states have call successors, (397) [2023-12-20 00:34:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 4172 transitions. [2023-12-20 00:34:15,593 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 4172 transitions. Word has length 66 [2023-12-20 00:34:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:15,593 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 4172 transitions. [2023-12-20 00:34:15,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:34:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 4172 transitions. [2023-12-20 00:34:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 00:34:15,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:15,594 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] [2023-12-20 00:34:15,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 00:34:15,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:15,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1187424253, now seen corresponding path program 1 times [2023-12-20 00:34:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:15,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193336966] [2023-12-20 00:34:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:15,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:15,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193336966] [2023-12-20 00:34:15,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193336966] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:15,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:15,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:15,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051164943] [2023-12-20 00:34:15,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:15,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:15,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:15,634 INFO L87 Difference]: Start difference. First operand 2959 states and 4172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 00:34:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:16,033 INFO L93 Difference]: Finished difference Result 8563 states and 12186 transitions. [2023-12-20 00:34:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:34:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 67 [2023-12-20 00:34:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:16,053 INFO L225 Difference]: With dead ends: 8563 [2023-12-20 00:34:16,053 INFO L226 Difference]: Without dead ends: 5613 [2023-12-20 00:34:16,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:34:16,061 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 349 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:16,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 420 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:34:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5613 states. [2023-12-20 00:34:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5613 to 4678. [2023-12-20 00:34:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 3895 states have (on average 1.3650834403080874) internal successors, (5317), 3959 states have internal predecessors, (5317), 475 states have call successors, (475), 283 states have call predecessors, (475), 307 states have return successors, (665), 436 states have call predecessors, (665), 472 states have call successors, (665) [2023-12-20 00:34:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 6457 transitions. [2023-12-20 00:34:16,268 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 6457 transitions. Word has length 67 [2023-12-20 00:34:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:16,268 INFO L495 AbstractCegarLoop]: Abstraction has 4678 states and 6457 transitions. [2023-12-20 00:34:16,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 00:34:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 6457 transitions. [2023-12-20 00:34:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 00:34:16,269 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:16,270 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] [2023-12-20 00:34:16,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 00:34:16,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:16,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:16,270 INFO L85 PathProgramCache]: Analyzing trace with hash -588871477, now seen corresponding path program 1 times [2023-12-20 00:34:16,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:16,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314857233] [2023-12-20 00:34:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314857233] [2023-12-20 00:34:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314857233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:16,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:16,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 00:34:16,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128847235] [2023-12-20 00:34:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:16,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:34:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:34:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:34:16,338 INFO L87 Difference]: Start difference. First operand 4678 states and 6457 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 00:34:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:16,981 INFO L93 Difference]: Finished difference Result 12165 states and 16847 transitions. [2023-12-20 00:34:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 00:34:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 68 [2023-12-20 00:34:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:17,010 INFO L225 Difference]: With dead ends: 12165 [2023-12-20 00:34:17,010 INFO L226 Difference]: Without dead ends: 7658 [2023-12-20 00:34:17,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-20 00:34:17,021 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 698 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:17,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 557 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:34:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7658 states. [2023-12-20 00:34:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7658 to 6864. [2023-12-20 00:34:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 5729 states have (on average 1.3655088148018852) internal successors, (7823), 5809 states have internal predecessors, (7823), 687 states have call successors, (687), 411 states have call predecessors, (687), 447 states have return successors, (971), 644 states have call predecessors, (971), 684 states have call successors, (971) [2023-12-20 00:34:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 9481 transitions. [2023-12-20 00:34:17,397 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 9481 transitions. Word has length 68 [2023-12-20 00:34:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:17,397 INFO L495 AbstractCegarLoop]: Abstraction has 6864 states and 9481 transitions. [2023-12-20 00:34:17,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 00:34:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 9481 transitions. [2023-12-20 00:34:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 00:34:17,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:17,399 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 00:34:17,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 00:34:17,399 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:17,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -421261476, now seen corresponding path program 1 times [2023-12-20 00:34:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717114790] [2023-12-20 00:34:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-20 00:34:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 00:34:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717114790] [2023-12-20 00:34:17,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717114790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308162758] [2023-12-20 00:34:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:17,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:17,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:17,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:17,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 00:34:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:17,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:34:17,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:17,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:34:17,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308162758] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:17,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:17,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-20 00:34:17,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861898550] [2023-12-20 00:34:17,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:17,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:34:17,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:34:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:34:17,608 INFO L87 Difference]: Start difference. First operand 6864 states and 9481 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:34:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:17,993 INFO L93 Difference]: Finished difference Result 18019 states and 25163 transitions. [2023-12-20 00:34:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:34:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2023-12-20 00:34:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:18,036 INFO L225 Difference]: With dead ends: 18019 [2023-12-20 00:34:18,037 INFO L226 Difference]: Without dead ends: 11165 [2023-12-20 00:34:18,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:34:18,053 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 125 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:18,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 437 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:34:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11165 states. [2023-12-20 00:34:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11165 to 10643. [2023-12-20 00:34:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10643 states, 8830 states have (on average 1.3558323895809739) internal successors, (11972), 8960 states have internal predecessors, (11972), 1097 states have call successors, (1097), 657 states have call predecessors, (1097), 715 states have return successors, (1717), 1027 states have call predecessors, (1717), 1094 states have call successors, (1717) [2023-12-20 00:34:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10643 states to 10643 states and 14786 transitions. [2023-12-20 00:34:18,517 INFO L78 Accepts]: Start accepts. Automaton has 10643 states and 14786 transitions. Word has length 71 [2023-12-20 00:34:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:18,517 INFO L495 AbstractCegarLoop]: Abstraction has 10643 states and 14786 transitions. [2023-12-20 00:34:18,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:34:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10643 states and 14786 transitions. [2023-12-20 00:34:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 00:34:18,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:18,519 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 00:34:18,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:18,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 00:34:18,725 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:18,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1122212262, now seen corresponding path program 1 times [2023-12-20 00:34:18,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:18,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121079908] [2023-12-20 00:34:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:34:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:34:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:18,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121079908] [2023-12-20 00:34:18,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121079908] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:18,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:18,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:34:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537157735] [2023-12-20 00:34:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:18,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:34:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:18,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:34:18,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:18,790 INFO L87 Difference]: Start difference. First operand 10643 states and 14786 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:20,018 INFO L93 Difference]: Finished difference Result 26618 states and 37192 transitions. [2023-12-20 00:34:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 00:34:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2023-12-20 00:34:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:20,064 INFO L225 Difference]: With dead ends: 26618 [2023-12-20 00:34:20,064 INFO L226 Difference]: Without dead ends: 17340 [2023-12-20 00:34:20,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-20 00:34:20,089 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 740 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:20,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1052 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 00:34:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2023-12-20 00:34:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 14611. [2023-12-20 00:34:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14611 states, 12202 states have (on average 1.3667431568595312) internal successors, (16677), 12412 states have internal predecessors, (16677), 1425 states have call successors, (1425), 853 states have call predecessors, (1425), 983 states have return successors, (2443), 1347 states have call predecessors, (2443), 1422 states have call successors, (2443) [2023-12-20 00:34:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14611 states to 14611 states and 20545 transitions. [2023-12-20 00:34:20,767 INFO L78 Accepts]: Start accepts. Automaton has 14611 states and 20545 transitions. Word has length 77 [2023-12-20 00:34:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:20,767 INFO L495 AbstractCegarLoop]: Abstraction has 14611 states and 20545 transitions. [2023-12-20 00:34:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14611 states and 20545 transitions. [2023-12-20 00:34:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-20 00:34:20,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:20,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:20,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 00:34:20,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:20,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 167760280, now seen corresponding path program 1 times [2023-12-20 00:34:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:20,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006818462] [2023-12-20 00:34:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:20,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:34:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:34:20,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006818462] [2023-12-20 00:34:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006818462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:20,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 00:34:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316160389] [2023-12-20 00:34:20,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:20,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:34:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:34:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:34:20,858 INFO L87 Difference]: Start difference. First operand 14611 states and 20545 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:22,319 INFO L93 Difference]: Finished difference Result 38035 states and 53591 transitions. [2023-12-20 00:34:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 00:34:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2023-12-20 00:34:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:22,382 INFO L225 Difference]: With dead ends: 38035 [2023-12-20 00:34:22,382 INFO L226 Difference]: Without dead ends: 24789 [2023-12-20 00:34:22,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:34:22,414 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 848 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:22,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 1320 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 00:34:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24789 states. [2023-12-20 00:34:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24789 to 21057. [2023-12-20 00:34:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21057 states, 17640 states have (on average 1.373015873015873) internal successors, (24220), 17920 states have internal predecessors, (24220), 2016 states have call successors, (2016), 1207 states have call predecessors, (2016), 1400 states have return successors, (3536), 1931 states have call predecessors, (3536), 2013 states have call successors, (3536) [2023-12-20 00:34:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 29772 transitions. [2023-12-20 00:34:23,525 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 29772 transitions. Word has length 80 [2023-12-20 00:34:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:23,526 INFO L495 AbstractCegarLoop]: Abstraction has 21057 states and 29772 transitions. [2023-12-20 00:34:23,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 29772 transitions. [2023-12-20 00:34:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 00:34:23,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:23,529 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:23,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 00:34:23,529 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:23,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1527405945, now seen corresponding path program 1 times [2023-12-20 00:34:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:23,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915075965] [2023-12-20 00:34:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:23,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-12-20 00:34:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 00:34:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915075965] [2023-12-20 00:34:23,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915075965] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:23,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:23,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:34:23,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995602360] [2023-12-20 00:34:23,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:23,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:34:23,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:34:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:23,598 INFO L87 Difference]: Start difference. First operand 21057 states and 29772 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 00:34:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:25,715 INFO L93 Difference]: Finished difference Result 64092 states and 92160 transitions. [2023-12-20 00:34:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 00:34:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 86 [2023-12-20 00:34:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:25,866 INFO L225 Difference]: With dead ends: 64092 [2023-12-20 00:34:25,866 INFO L226 Difference]: Without dead ends: 43049 [2023-12-20 00:34:25,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-12-20 00:34:25,909 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1085 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:25,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 890 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:34:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43049 states. [2023-12-20 00:34:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43049 to 40539. [2023-12-20 00:34:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40539 states, 33832 states have (on average 1.3446145660912745) internal successors, (45491), 34367 states have internal predecessors, (45491), 3900 states have call successors, (3900), 2376 states have call predecessors, (3900), 2806 states have return successors, (7008), 3797 states have call predecessors, (7008), 3897 states have call successors, (7008) [2023-12-20 00:34:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40539 states to 40539 states and 56399 transitions. [2023-12-20 00:34:27,783 INFO L78 Accepts]: Start accepts. Automaton has 40539 states and 56399 transitions. Word has length 86 [2023-12-20 00:34:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:27,784 INFO L495 AbstractCegarLoop]: Abstraction has 40539 states and 56399 transitions. [2023-12-20 00:34:27,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 00:34:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40539 states and 56399 transitions. [2023-12-20 00:34:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-20 00:34:27,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:27,787 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 00:34:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 00:34:27,788 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:27,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash 253434099, now seen corresponding path program 1 times [2023-12-20 00:34:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:27,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391408922] [2023-12-20 00:34:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:27,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-12-20 00:34:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:34:27,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391408922] [2023-12-20 00:34:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391408922] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397251370] [2023-12-20 00:34:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:27,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:27,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:27,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:27,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 00:34:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:27,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 00:34:27,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:34:28,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:34:28,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397251370] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:28,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:34:28,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 6] total 15 [2023-12-20 00:34:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305315408] [2023-12-20 00:34:28,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:34:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:34:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-20 00:34:28,139 INFO L87 Difference]: Start difference. First operand 40539 states and 56399 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:29,771 INFO L93 Difference]: Finished difference Result 43023 states and 59555 transitions. [2023-12-20 00:34:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 00:34:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2023-12-20 00:34:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:29,938 INFO L225 Difference]: With dead ends: 43023 [2023-12-20 00:34:29,939 INFO L226 Difference]: Without dead ends: 43020 [2023-12-20 00:34:29,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:34:29,952 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 383 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:29,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 981 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:34:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43020 states. [2023-12-20 00:34:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43020 to 41535. [2023-12-20 00:34:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41535 states, 34647 states have (on average 1.3413859785840043) internal successors, (46475), 35200 states have internal predecessors, (46475), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2881 states have return successors, (7155), 3893 states have call predecessors, (7155), 4003 states have call successors, (7155) [2023-12-20 00:34:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41535 states to 41535 states and 57636 transitions. [2023-12-20 00:34:31,744 INFO L78 Accepts]: Start accepts. Automaton has 41535 states and 57636 transitions. Word has length 87 [2023-12-20 00:34:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:31,745 INFO L495 AbstractCegarLoop]: Abstraction has 41535 states and 57636 transitions. [2023-12-20 00:34:31,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 41535 states and 57636 transitions. [2023-12-20 00:34:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 00:34:31,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:31,751 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-20 00:34:31,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:31,957 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:31,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1399470103, now seen corresponding path program 1 times [2023-12-20 00:34:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:31,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706883833] [2023-12-20 00:34:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:34:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-20 00:34:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 00:34:32,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:32,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706883833] [2023-12-20 00:34:32,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706883833] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:32,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:32,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:34:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13466372] [2023-12-20 00:34:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:32,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:34:32,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:34:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:34:32,064 INFO L87 Difference]: Start difference. First operand 41535 states and 57636 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 00:34:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:34,035 INFO L93 Difference]: Finished difference Result 86391 states and 119808 transitions. [2023-12-20 00:34:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 00:34:34,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2023-12-20 00:34:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:34,144 INFO L225 Difference]: With dead ends: 86391 [2023-12-20 00:34:34,144 INFO L226 Difference]: Without dead ends: 44870 [2023-12-20 00:34:34,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-20 00:34:34,193 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 396 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:34,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 388 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:34:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44870 states. [2023-12-20 00:34:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44870 to 41479. [2023-12-20 00:34:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41479 states, 34479 states have (on average 1.3318541721047594) internal successors, (45921), 35144 states have internal predecessors, (45921), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2993 states have return successors, (6707), 3893 states have call predecessors, (6707), 4003 states have call successors, (6707) [2023-12-20 00:34:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41479 states to 41479 states and 56634 transitions. [2023-12-20 00:34:36,199 INFO L78 Accepts]: Start accepts. Automaton has 41479 states and 56634 transitions. Word has length 89 [2023-12-20 00:34:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:36,199 INFO L495 AbstractCegarLoop]: Abstraction has 41479 states and 56634 transitions. [2023-12-20 00:34:36,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 00:34:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41479 states and 56634 transitions. [2023-12-20 00:34:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 00:34:36,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:36,204 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-20 00:34:36,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 00:34:36,204 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:36,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1328739243, now seen corresponding path program 1 times [2023-12-20 00:34:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443590689] [2023-12-20 00:34:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:34:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-20 00:34:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 00:34:36,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:36,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443590689] [2023-12-20 00:34:36,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443590689] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:36,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:36,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:36,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186717416] [2023-12-20 00:34:36,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:36,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:36,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:36,240 INFO L87 Difference]: Start difference. First operand 41479 states and 56634 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:37,818 INFO L93 Difference]: Finished difference Result 46943 states and 64319 transitions. [2023-12-20 00:34:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:34:37,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2023-12-20 00:34:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:37,917 INFO L225 Difference]: With dead ends: 46943 [2023-12-20 00:34:37,918 INFO L226 Difference]: Without dead ends: 44667 [2023-12-20 00:34:37,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:34:37,933 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 291 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:37,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 264 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:34:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44667 states. [2023-12-20 00:34:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44667 to 41329. [2023-12-20 00:34:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41329 states, 34359 states have (on average 1.3321400506417533) internal successors, (45771), 35022 states have internal predecessors, (45771), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6686), 3874 states have call predecessors, (6686), 3984 states have call successors, (6686) [2023-12-20 00:34:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41329 states to 41329 states and 56444 transitions. [2023-12-20 00:34:39,768 INFO L78 Accepts]: Start accepts. Automaton has 41329 states and 56444 transitions. Word has length 89 [2023-12-20 00:34:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:39,768 INFO L495 AbstractCegarLoop]: Abstraction has 41329 states and 56444 transitions. [2023-12-20 00:34:39,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 00:34:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 41329 states and 56444 transitions. [2023-12-20 00:34:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-20 00:34:39,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:39,772 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-20 00:34:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 00:34:39,772 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:39,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash 899233760, now seen corresponding path program 1 times [2023-12-20 00:34:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:39,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538181231] [2023-12-20 00:34:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:34:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-20 00:34:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 00:34:39,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538181231] [2023-12-20 00:34:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538181231] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:39,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:39,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:34:39,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916060376] [2023-12-20 00:34:39,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:34:39,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:34:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:34:39,822 INFO L87 Difference]: Start difference. First operand 41329 states and 56444 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 00:34:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:41,839 INFO L93 Difference]: Finished difference Result 85171 states and 116371 transitions. [2023-12-20 00:34:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 00:34:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 90 [2023-12-20 00:34:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:41,933 INFO L225 Difference]: With dead ends: 85171 [2023-12-20 00:34:41,933 INFO L226 Difference]: Without dead ends: 43852 [2023-12-20 00:34:41,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-12-20 00:34:41,993 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 1166 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:41,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 861 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:34:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43852 states. [2023-12-20 00:34:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43852 to 41444. [2023-12-20 00:34:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41444 states, 34474 states have (on average 1.3232871149271914) internal successors, (45619), 35137 states have internal predecessors, (45619), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6350), 3874 states have call predecessors, (6350), 3984 states have call successors, (6350) [2023-12-20 00:34:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41444 states to 41444 states and 55956 transitions. [2023-12-20 00:34:43,954 INFO L78 Accepts]: Start accepts. Automaton has 41444 states and 55956 transitions. Word has length 90 [2023-12-20 00:34:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:43,954 INFO L495 AbstractCegarLoop]: Abstraction has 41444 states and 55956 transitions. [2023-12-20 00:34:43,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 00:34:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 41444 states and 55956 transitions. [2023-12-20 00:34:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-20 00:34:43,961 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:43,961 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 00:34:43,961 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:43,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash 488987476, now seen corresponding path program 1 times [2023-12-20 00:34:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102085096] [2023-12-20 00:34:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:34:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:34:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:43,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 00:34:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-20 00:34:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 00:34:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102085096] [2023-12-20 00:34:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102085096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:44,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:34:44,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:34:44,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511751937] [2023-12-20 00:34:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:44,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:34:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:34:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:34:44,003 INFO L87 Difference]: Start difference. First operand 41444 states and 55956 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-20 00:34:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:46,452 INFO L93 Difference]: Finished difference Result 111991 states and 152211 transitions. [2023-12-20 00:34:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:34:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 109 [2023-12-20 00:34:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:46,602 INFO L225 Difference]: With dead ends: 111991 [2023-12-20 00:34:46,602 INFO L226 Difference]: Without dead ends: 71557 [2023-12-20 00:34:46,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:34:46,665 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 368 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:46,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 404 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:34:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71557 states. [2023-12-20 00:34:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71557 to 65878. [2023-12-20 00:34:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65878 states, 54982 states have (on average 1.3281073805972863) internal successors, (73022), 56058 states have internal predecessors, (73022), 6164 states have call successors, (6164), 3832 states have call predecessors, (6164), 4731 states have return successors, (9893), 5988 states have call predecessors, (9893), 6161 states have call successors, (9893) [2023-12-20 00:34:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65878 states to 65878 states and 89079 transitions. [2023-12-20 00:34:49,667 INFO L78 Accepts]: Start accepts. Automaton has 65878 states and 89079 transitions. Word has length 109 [2023-12-20 00:34:49,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:49,667 INFO L495 AbstractCegarLoop]: Abstraction has 65878 states and 89079 transitions. [2023-12-20 00:34:49,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-20 00:34:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 65878 states and 89079 transitions. [2023-12-20 00:34:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-20 00:34:49,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:49,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:49,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 00:34:49,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:49,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -612010056, now seen corresponding path program 1 times [2023-12-20 00:34:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002255218] [2023-12-20 00:34:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-20 00:34:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-12-20 00:34:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-20 00:34:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-20 00:34:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-12-20 00:34:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 00:34:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002255218] [2023-12-20 00:34:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002255218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922636076] [2023-12-20 00:34:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:49,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:49,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 00:34:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:49,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:34:49,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 00:34:49,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:34:49,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922636076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:49,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-20 00:34:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997276697] [2023-12-20 00:34:49,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:34:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:34:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:34:49,908 INFO L87 Difference]: Start difference. First operand 65878 states and 89079 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-20 00:34:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:53,536 INFO L93 Difference]: Finished difference Result 163026 states and 220174 transitions. [2023-12-20 00:34:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:34:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 125 [2023-12-20 00:34:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:53,760 INFO L225 Difference]: With dead ends: 163026 [2023-12-20 00:34:53,760 INFO L226 Difference]: Without dead ends: 97158 [2023-12-20 00:34:53,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:34:53,847 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 90 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:53,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 328 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:34:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97158 states. [2023-12-20 00:34:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97158 to 97153. [2023-12-20 00:34:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97153 states, 80729 states have (on average 1.314843488709138) internal successors, (106146), 82231 states have internal predecessors, (106146), 9318 states have call successors, (9318), 5826 states have call predecessors, (9318), 7105 states have return successors, (14307), 9096 states have call predecessors, (14307), 9315 states have call successors, (14307) [2023-12-20 00:34:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97153 states to 97153 states and 129771 transitions. [2023-12-20 00:34:58,208 INFO L78 Accepts]: Start accepts. Automaton has 97153 states and 129771 transitions. Word has length 125 [2023-12-20 00:34:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:58,209 INFO L495 AbstractCegarLoop]: Abstraction has 97153 states and 129771 transitions. [2023-12-20 00:34:58,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-20 00:34:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 97153 states and 129771 transitions. [2023-12-20 00:34:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-20 00:34:58,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:58,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:58,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:58,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:58,424 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:58,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash 501999954, now seen corresponding path program 1 times [2023-12-20 00:34:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478558953] [2023-12-20 00:34:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:34:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:34:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:34:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:34:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:34:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-20 00:34:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-20 00:34:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 00:34:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 00:34:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-12-20 00:34:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-12-20 00:34:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-12-20 00:34:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-12-20 00:34:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-20 00:34:58,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:58,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478558953] [2023-12-20 00:34:58,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478558953] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:58,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607987365] [2023-12-20 00:34:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:58,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:58,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:58,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 00:34:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:34:58,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:34:58,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 00:34:58,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:34:58,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607987365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:34:58,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:58,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-20 00:34:58,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138916119] [2023-12-20 00:34:58,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:34:58,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:34:58,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:34:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:34:58,657 INFO L87 Difference]: Start difference. First operand 97153 states and 129771 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-20 00:35:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:05,693 INFO L93 Difference]: Finished difference Result 278997 states and 378983 transitions. [2023-12-20 00:35:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:35:05,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 128 [2023-12-20 00:35:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:06,215 INFO L225 Difference]: With dead ends: 278997 [2023-12-20 00:35:06,215 INFO L226 Difference]: Without dead ends: 187955 [2023-12-20 00:35:06,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:35:06,371 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 104 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:06,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:35:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187955 states. [2023-12-20 00:35:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187955 to 186397. [2023-12-20 00:35:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186397 states, 155065 states have (on average 1.3097797697739657) internal successors, (203101), 157998 states have internal predecessors, (203101), 17693 states have call successors, (17693), 11135 states have call predecessors, (17693), 13638 states have return successors, (27056), 17264 states have call predecessors, (27056), 17690 states have call successors, (27056) [2023-12-20 00:35:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186397 states to 186397 states and 247850 transitions. [2023-12-20 00:35:15,313 INFO L78 Accepts]: Start accepts. Automaton has 186397 states and 247850 transitions. Word has length 128 [2023-12-20 00:35:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:15,313 INFO L495 AbstractCegarLoop]: Abstraction has 186397 states and 247850 transitions. [2023-12-20 00:35:15,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-20 00:35:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 186397 states and 247850 transitions. [2023-12-20 00:35:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-20 00:35:15,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:15,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:35:15,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 00:35:15,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 00:35:15,529 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:15,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1641928410, now seen corresponding path program 1 times [2023-12-20 00:35:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:15,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559699792] [2023-12-20 00:35:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-20 00:35:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-20 00:35:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 00:35:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 00:35:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-12-20 00:35:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-20 00:35:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-12-20 00:35:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-12-20 00:35:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-20 00:35:15,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:15,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559699792] [2023-12-20 00:35:15,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559699792] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:15,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943969377] [2023-12-20 00:35:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:35:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:35:15,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:35:15,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 00:35:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:15,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:35:15,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:35:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-20 00:35:15,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:35:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943969377] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:15,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:35:15,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-20 00:35:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292792465] [2023-12-20 00:35:15,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:15,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:35:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:35:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:35:15,777 INFO L87 Difference]: Start difference. First operand 186397 states and 247850 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12)