/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-11-01 08:00:35,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 08:00:35,697 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-01 08:00:35,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 08:00:35,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 08:00:35,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 08:00:35,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 08:00:35,724 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 08:00:35,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 08:00:35,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 08:00:35,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 08:00:35,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 08:00:35,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 08:00:35,726 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 08:00:35,726 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 08:00:35,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 08:00:35,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 08:00:35,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 08:00:35,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 08:00:35,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 08:00:35,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 08:00:35,732 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 08:00:35,732 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 08:00:35,733 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 08:00:35,733 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 08:00:35,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 08:00:35,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 08:00:35,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 08:00:35,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 08:00:35,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 08:00:35,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 08:00:35,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:35,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 08:00:35,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 08:00:35,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 08:00:35,735 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 08:00:35,735 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:35,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 08:00:35,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 08:00:35,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 08:00:35,735 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 08:00:35,736 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 08:00:35,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:36,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 08:00:36,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 08:00:36,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 08:00:36,036 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 08:00:36,039 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 08:00:36,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2024-11-01 08:00:37,546 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 08:00:37,905 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 08:00:37,906 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2024-11-01 08:00:37,930 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3116d4c7e/92570e7d1cad45b494b935379ae941cb/FLAGdccb0d21c [2024-11-01 08:00:37,945 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3116d4c7e/92570e7d1cad45b494b935379ae941cb [2024-11-01 08:00:37,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 08:00:37,947 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 08:00:37,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:37,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 08:00:37,952 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 08:00:37,953 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:37" (1/1) ... [2024-11-01 08:00:37,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6629f214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:37, skipping insertion in model container [2024-11-01 08:00:37,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:37" (1/1) ... [2024-11-01 08:00:38,015 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 08:00:38,286 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c[1266,1279] [2024-11-01 08:00:38,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:38,562 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 08:00:38,572 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c[1266,1279] [2024-11-01 08:00:38,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:38,701 INFO L204 MainTranslator]: Completed translation [2024-11-01 08:00:38,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38 WrapperNode [2024-11-01 08:00:38,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:38,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:38,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 08:00:38,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 08:00:38,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,820 INFO L138 Inliner]: procedures = 18, calls = 107, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1594 [2024-11-01 08:00:38,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:38,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 08:00:38,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 08:00:38,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 08:00:38,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,839 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,872 INFO L175 MemorySlicer]: Split 63 memory accesses to 4 slices as follows [8, 2, 24, 29]. 46 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0]. The 30 writes are split as follows [4, 0, 12, 14]. [2024-11-01 08:00:38,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,900 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,904 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,926 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 08:00:38,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 08:00:38,927 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 08:00:38,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 08:00:38,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 08:00:38,955 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) [2024-11-01 08:00:38,960 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 [2024-11-01 08:00:38,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 08:00:38,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-01 08:00:38,979 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 08:00:38,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 08:00:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-01 08:00:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-11-01 08:00:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-11-01 08:00:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2024-11-01 08:00:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-01 08:00:39,242 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 08:00:39,244 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 08:00:40,400 INFO L? ?]: Removed 1019 outVars from TransFormulas that were not future-live. [2024-11-01 08:00:40,400 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 08:00:40,413 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 08:00:40,413 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-01 08:00:40,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:40 BoogieIcfgContainer [2024-11-01 08:00:40,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 08:00:40,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 08:00:40,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 08:00:40,422 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 08:00:40,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 08:00:37" (1/3) ... [2024-11-01 08:00:40,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b83e85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:00:40, skipping insertion in model container [2024-11-01 08:00:40,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (2/3) ... [2024-11-01 08:00:40,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b83e85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:00:40, skipping insertion in model container [2024-11-01 08:00:40,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:40" (3/3) ... [2024-11-01 08:00:40,429 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2024-11-01 08:00:40,454 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 08:00:40,455 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 08:00:40,562 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 08:00:40,568 INFO L333 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, 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;@55b31bab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 08:00:40,568 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 08:00:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-01 08:00:40,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:40,580 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:40,580 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:40,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash -958431594, now seen corresponding path program 1 times [2024-11-01 08:00:40,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223691554] [2024-11-01 08:00:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:40,593 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:40,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:40,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:40,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-01 08:00:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:41,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-01 08:00:41,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-01 08:00:41,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-01 08:00:41,293 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223691554] [2024-11-01 08:00:41,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223691554] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:41,294 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:41,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-01 08:00:41,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310600634] [2024-11-01 08:00:41,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:41,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-01 08:00:41,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-01 08:00:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:41,354 INFO L87 Difference]: Start difference. First operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-01 08:00:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:41,395 INFO L93 Difference]: Finished difference Result 149 states and 237 transitions. [2024-11-01 08:00:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-01 08:00:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2024-11-01 08:00:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:41,406 INFO L225 Difference]: With dead ends: 149 [2024-11-01 08:00:41,406 INFO L226 Difference]: Without dead ends: 75 [2024-11-01 08:00:41,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:41,419 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:41,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-01 08:00:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-01 08:00:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2024-11-01 08:00:41,489 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 41 [2024-11-01 08:00:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:41,489 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2024-11-01 08:00:41,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-01 08:00:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2024-11-01 08:00:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-01 08:00:41,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:41,499 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:41,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-01 08:00:41,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:41,703 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:41,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2099855424, now seen corresponding path program 1 times [2024-11-01 08:00:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:41,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068705680] [2024-11-01 08:00:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:41,705 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:41,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:41,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:41,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-01 08:00:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:42,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:42,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:42,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:42,503 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068705680] [2024-11-01 08:00:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068705680] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:42,503 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:42,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466234907] [2024-11-01 08:00:42,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:42,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:42,507 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:42,544 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2024-11-01 08:00:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 41 [2024-11-01 08:00:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:42,547 INFO L225 Difference]: With dead ends: 149 [2024-11-01 08:00:42,547 INFO L226 Difference]: Without dead ends: 78 [2024-11-01 08:00:42,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:42,548 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:42,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 279 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-01 08:00:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-01 08:00:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2024-11-01 08:00:42,561 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 41 [2024-11-01 08:00:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:42,561 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2024-11-01 08:00:42,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2024-11-01 08:00:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-01 08:00:42,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:42,567 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2024-11-01 08:00:42,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:42,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:42,769 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:42,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash 963432764, now seen corresponding path program 1 times [2024-11-01 08:00:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:42,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286697063] [2024-11-01 08:00:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:42,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:42,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:42,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:42,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-01 08:00:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:43,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:43,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:43,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:43,738 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286697063] [2024-11-01 08:00:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [286697063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:43,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447550669] [2024-11-01 08:00:43,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:43,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:43,740 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:43,790 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2024-11-01 08:00:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:00:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 45 [2024-11-01 08:00:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:43,791 INFO L225 Difference]: With dead ends: 153 [2024-11-01 08:00:43,791 INFO L226 Difference]: Without dead ends: 82 [2024-11-01 08:00:43,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:43,793 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:43,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 463 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-01 08:00:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-01 08:00:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2024-11-01 08:00:43,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 45 [2024-11-01 08:00:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:43,799 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2024-11-01 08:00:43,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2024-11-01 08:00:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-01 08:00:43,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:43,800 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:43,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-01 08:00:44,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:44,005 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:44,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash 390562872, now seen corresponding path program 2 times [2024-11-01 08:00:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:44,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433344706] [2024-11-01 08:00:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:44,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:44,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:44,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:44,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-01 08:00:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:44,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:44,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-01 08:00:44,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-01 08:00:44,712 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433344706] [2024-11-01 08:00:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433344706] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:44,717 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:44,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125898598] [2024-11-01 08:00:44,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:44,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:44,719 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:44,782 INFO L93 Difference]: Finished difference Result 153 states and 197 transitions. [2024-11-01 08:00:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 49 [2024-11-01 08:00:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:44,789 INFO L225 Difference]: With dead ends: 153 [2024-11-01 08:00:44,789 INFO L226 Difference]: Without dead ends: 85 [2024-11-01 08:00:44,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:44,790 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:44,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-01 08:00:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-01 08:00:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 78 states have internal predecessors, (97), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2024-11-01 08:00:44,808 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 49 [2024-11-01 08:00:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:44,808 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2024-11-01 08:00:44,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2024-11-01 08:00:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-01 08:00:44,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:44,809 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2024-11-01 08:00:44,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:45,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:45,010 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:45,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153908, now seen corresponding path program 1 times [2024-11-01 08:00:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610931155] [2024-11-01 08:00:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:45,012 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:45,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-01 08:00:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:45,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:45,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:45,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:45,823 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:45,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610931155] [2024-11-01 08:00:45,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [610931155] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:45,824 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:45,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:45,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873807674] [2024-11-01 08:00:45,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:45,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:45,830 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:45,894 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2024-11-01 08:00:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 53 [2024-11-01 08:00:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:45,902 INFO L225 Difference]: With dead ends: 153 [2024-11-01 08:00:45,903 INFO L226 Difference]: Without dead ends: 88 [2024-11-01 08:00:45,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:45,904 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:45,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-01 08:00:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-01 08:00:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2024-11-01 08:00:45,922 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 53 [2024-11-01 08:00:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:45,923 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2024-11-01 08:00:45,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2024-11-01 08:00:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-01 08:00:45,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:45,924 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2024-11-01 08:00:45,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:46,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:46,125 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:46,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1928044208, now seen corresponding path program 1 times [2024-11-01 08:00:46,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:46,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109398703] [2024-11-01 08:00:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:46,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:46,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:46,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-01 08:00:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:46,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:46,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:47,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:47,081 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109398703] [2024-11-01 08:00:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109398703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:47,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:47,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319360108] [2024-11-01 08:00:47,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:47,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:47,084 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:47,176 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2024-11-01 08:00:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:00:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 57 [2024-11-01 08:00:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:47,186 INFO L225 Difference]: With dead ends: 157 [2024-11-01 08:00:47,187 INFO L226 Difference]: Without dead ends: 92 [2024-11-01 08:00:47,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:47,188 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:47,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 641 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-01 08:00:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-01 08:00:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2024-11-01 08:00:47,202 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 57 [2024-11-01 08:00:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:47,203 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2024-11-01 08:00:47,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2024-11-01 08:00:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-01 08:00:47,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:47,204 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2024-11-01 08:00:47,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:47,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:47,409 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:47,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash 779777708, now seen corresponding path program 2 times [2024-11-01 08:00:47,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:47,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117218161] [2024-11-01 08:00:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:47,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:47,412 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:47,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-01 08:00:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:48,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-01 08:00:48,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-01 08:00:48,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-01 08:00:49,186 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:49,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117218161] [2024-11-01 08:00:49,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [117218161] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:49,186 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:49,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-01 08:00:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079031910] [2024-11-01 08:00:49,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:49,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:49,187 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-01 08:00:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:49,418 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2024-11-01 08:00:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-01 08:00:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-11-01 08:00:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:49,419 INFO L225 Difference]: With dead ends: 106 [2024-11-01 08:00:49,420 INFO L226 Difference]: Without dead ends: 104 [2024-11-01 08:00:49,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:49,420 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 156 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:49,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 413 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-01 08:00:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-01 08:00:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-01 08:00:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 92 states have internal predecessors, (111), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2024-11-01 08:00:49,429 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 61 [2024-11-01 08:00:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:49,430 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2024-11-01 08:00:49,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-01 08:00:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2024-11-01 08:00:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-01 08:00:49,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:49,431 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 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] [2024-11-01 08:00:49,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:49,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:49,632 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:49,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -466492681, now seen corresponding path program 1 times [2024-11-01 08:00:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:49,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074148500] [2024-11-01 08:00:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:49,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:49,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:49,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-01 08:00:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:51,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:51,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-01 08:00:51,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-01 08:00:51,172 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074148500] [2024-11-01 08:00:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074148500] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:51,173 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:51,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340152084] [2024-11-01 08:00:51,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:51,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:51,174 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:51,203 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2024-11-01 08:00:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2024-11-01 08:00:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:51,207 INFO L225 Difference]: With dead ends: 171 [2024-11-01 08:00:51,207 INFO L226 Difference]: Without dead ends: 107 [2024-11-01 08:00:51,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:51,208 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:51,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-01 08:00:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-01 08:00:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.2) internal successors, (114), 95 states have internal predecessors, (114), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-11-01 08:00:51,227 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 124 [2024-11-01 08:00:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:51,227 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-11-01 08:00:51,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-11-01 08:00:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-01 08:00:51,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:51,229 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 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] [2024-11-01 08:00:51,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-01 08:00:51,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:51,430 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:51,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash 57551859, now seen corresponding path program 1 times [2024-11-01 08:00:51,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:51,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377995345] [2024-11-01 08:00:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:51,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:51,434 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-01 08:00:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:53,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:53,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-01 08:00:53,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-01 08:00:53,061 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377995345] [2024-11-01 08:00:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [377995345] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:53,061 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050050694] [2024-11-01 08:00:53,062 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:53,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:53,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:53,063 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:53,093 INFO L93 Difference]: Finished difference Result 177 states and 225 transitions. [2024-11-01 08:00:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2024-11-01 08:00:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:53,095 INFO L225 Difference]: With dead ends: 177 [2024-11-01 08:00:53,095 INFO L226 Difference]: Without dead ends: 110 [2024-11-01 08:00:53,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:53,096 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:53,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-01 08:00:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-01 08:00:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2024-11-01 08:00:53,109 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 128 [2024-11-01 08:00:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:53,109 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2024-11-01 08:00:53,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2024-11-01 08:00:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-01 08:00:53,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:53,111 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 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] [2024-11-01 08:00:53,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:53,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:53,316 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:53,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1200629359, now seen corresponding path program 1 times [2024-11-01 08:00:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950212766] [2024-11-01 08:00:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:53,317 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:53,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:53,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-01 08:00:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:54,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:54,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-01 08:00:54,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2024-11-01 08:00:55,031 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:55,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950212766] [2024-11-01 08:00:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950212766] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:55,032 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264274784] [2024-11-01 08:00:55,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:55,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:55,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:55,033 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:55,066 INFO L93 Difference]: Finished difference Result 183 states and 231 transitions. [2024-11-01 08:00:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2024-11-01 08:00:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:55,069 INFO L225 Difference]: With dead ends: 183 [2024-11-01 08:00:55,069 INFO L226 Difference]: Without dead ends: 113 [2024-11-01 08:00:55,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:55,069 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:55,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-01 08:00:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-01 08:00:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 140 transitions. [2024-11-01 08:00:55,076 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 140 transitions. Word has length 132 [2024-11-01 08:00:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:55,076 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 140 transitions. [2024-11-01 08:00:55,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 140 transitions. [2024-11-01 08:00:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-01 08:00:55,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:55,077 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 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] [2024-11-01 08:00:55,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-01 08:00:55,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:55,278 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:55,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 197194347, now seen corresponding path program 1 times [2024-11-01 08:00:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:55,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511537630] [2024-11-01 08:00:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:55,279 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:55,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:55,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:55,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-01 08:00:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:56,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:56,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-01 08:00:56,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-01 08:00:57,033 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511537630] [2024-11-01 08:00:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511537630] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:57,034 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424094311] [2024-11-01 08:00:57,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:57,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:57,035 INFO L87 Difference]: Start difference. First operand 113 states and 140 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:57,065 INFO L93 Difference]: Finished difference Result 189 states and 237 transitions. [2024-11-01 08:00:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:57,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2024-11-01 08:00:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:57,069 INFO L225 Difference]: With dead ends: 189 [2024-11-01 08:00:57,069 INFO L226 Difference]: Without dead ends: 116 [2024-11-01 08:00:57,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:57,070 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:57,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-01 08:00:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-01 08:00:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2024-11-01 08:00:57,080 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 136 [2024-11-01 08:00:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:57,080 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2024-11-01 08:00:57,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2024-11-01 08:00:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-01 08:00:57,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:57,082 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 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] [2024-11-01 08:00:57,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:57,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:57,283 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:57,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash -275664921, now seen corresponding path program 1 times [2024-11-01 08:00:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:57,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006326881] [2024-11-01 08:00:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:57,284 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:57,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-01 08:00:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:59,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:59,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-01 08:00:59,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-01 08:00:59,192 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006326881] [2024-11-01 08:00:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006326881] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:59,192 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:59,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048544056] [2024-11-01 08:00:59,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:59,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:59,194 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:59,234 INFO L93 Difference]: Finished difference Result 195 states and 243 transitions. [2024-11-01 08:00:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2024-11-01 08:00:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:59,237 INFO L225 Difference]: With dead ends: 195 [2024-11-01 08:00:59,237 INFO L226 Difference]: Without dead ends: 119 [2024-11-01 08:00:59,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:59,238 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:59,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-01 08:00:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-01 08:00:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2024-11-01 08:00:59,250 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 140 [2024-11-01 08:00:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:59,250 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2024-11-01 08:00:59,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2024-11-01 08:00:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-01 08:00:59,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:59,252 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:00:59,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-01 08:00:59,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:59,457 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:59,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2131001629, now seen corresponding path program 1 times [2024-11-01 08:00:59,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:59,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816180688] [2024-11-01 08:00:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:59,460 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:00:59,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-01 08:01:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:01,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:01,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-01 08:01:01,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-01 08:01:01,458 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816180688] [2024-11-01 08:01:01,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816180688] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:01,458 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:01,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:01,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331555694] [2024-11-01 08:01:01,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:01,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:01,461 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:01,507 INFO L93 Difference]: Finished difference Result 201 states and 249 transitions. [2024-11-01 08:01:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 144 [2024-11-01 08:01:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:01,511 INFO L225 Difference]: With dead ends: 201 [2024-11-01 08:01:01,511 INFO L226 Difference]: Without dead ends: 122 [2024-11-01 08:01:01,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:01,512 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:01,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-01 08:01:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-01 08:01:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 states have internal predecessors, (129), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 149 transitions. [2024-11-01 08:01:01,520 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 149 transitions. Word has length 144 [2024-11-01 08:01:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:01,520 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 149 transitions. [2024-11-01 08:01:01,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 149 transitions. [2024-11-01 08:01:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-01 08:01:01,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:01,521 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:01,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-01 08:01:01,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:01,722 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:01,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1717534559, now seen corresponding path program 1 times [2024-11-01 08:01:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214141955] [2024-11-01 08:01:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:01,723 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:01,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:01,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:01,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-01 08:01:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:03,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:03,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-01 08:01:03,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-01 08:01:03,845 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:03,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214141955] [2024-11-01 08:01:03,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214141955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:03,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:03,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086322820] [2024-11-01 08:01:03,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:03,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:03,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:03,847 INFO L87 Difference]: Start difference. First operand 122 states and 149 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:03,932 INFO L93 Difference]: Finished difference Result 208 states and 256 transitions. [2024-11-01 08:01:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 148 [2024-11-01 08:01:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:03,936 INFO L225 Difference]: With dead ends: 208 [2024-11-01 08:01:03,936 INFO L226 Difference]: Without dead ends: 126 [2024-11-01 08:01:03,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:03,937 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:03,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-01 08:01:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-01 08:01:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2024-11-01 08:01:03,947 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 148 [2024-11-01 08:01:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:03,948 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2024-11-01 08:01:03,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2024-11-01 08:01:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-01 08:01:03,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:03,949 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:03,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:04,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:04,154 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:04,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash 9888219, now seen corresponding path program 2 times [2024-11-01 08:01:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030109075] [2024-11-01 08:01:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:04,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:04,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:04,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:04,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-01 08:01:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:06,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:06,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-01 08:01:06,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:06,253 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030109075] [2024-11-01 08:01:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030109075] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:06,255 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098546298] [2024-11-01 08:01:06,255 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:06,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:06,256 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:06,284 INFO L93 Difference]: Finished difference Result 215 states and 263 transitions. [2024-11-01 08:01:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 152 [2024-11-01 08:01:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:06,286 INFO L225 Difference]: With dead ends: 215 [2024-11-01 08:01:06,286 INFO L226 Difference]: Without dead ends: 129 [2024-11-01 08:01:06,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:06,288 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:06,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-01 08:01:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-01 08:01:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 117 states have internal predecessors, (136), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2024-11-01 08:01:06,295 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 152 [2024-11-01 08:01:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:06,295 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2024-11-01 08:01:06,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2024-11-01 08:01:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-01 08:01:06,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:06,297 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:06,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-01 08:01:06,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:06,497 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:06,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash 454071767, now seen corresponding path program 1 times [2024-11-01 08:01:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:06,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441985009] [2024-11-01 08:01:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:06,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:06,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:06,500 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:06,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-01 08:01:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:08,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:08,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-01 08:01:08,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:08,675 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441985009] [2024-11-01 08:01:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441985009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:08,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590133600] [2024-11-01 08:01:08,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:08,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:08,678 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:08,740 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2024-11-01 08:01:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:08,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 156 [2024-11-01 08:01:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:08,743 INFO L225 Difference]: With dead ends: 222 [2024-11-01 08:01:08,743 INFO L226 Difference]: Without dead ends: 133 [2024-11-01 08:01:08,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:08,743 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:08,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-01 08:01:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-01 08:01:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2024-11-01 08:01:08,751 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 156 [2024-11-01 08:01:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:08,751 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2024-11-01 08:01:08,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2024-11-01 08:01:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-01 08:01:08,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:08,753 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:08,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-01 08:01:08,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:08,954 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:08,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash 962063315, now seen corresponding path program 2 times [2024-11-01 08:01:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765106369] [2024-11-01 08:01:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:08,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:08,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:08,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:08,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-01 08:01:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:11,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:11,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-01 08:01:11,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:01:11,145 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765106369] [2024-11-01 08:01:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [765106369] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:11,145 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:11,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635031460] [2024-11-01 08:01:11,145 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:11,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:11,147 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:11,174 INFO L93 Difference]: Finished difference Result 229 states and 277 transitions. [2024-11-01 08:01:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:11,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 160 [2024-11-01 08:01:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:11,176 INFO L225 Difference]: With dead ends: 229 [2024-11-01 08:01:11,176 INFO L226 Difference]: Without dead ends: 136 [2024-11-01 08:01:11,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:11,177 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:11,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-01 08:01:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-01 08:01:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2024-11-01 08:01:11,183 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 160 [2024-11-01 08:01:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:11,184 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2024-11-01 08:01:11,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2024-11-01 08:01:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-01 08:01:11,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:11,185 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:11,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-01 08:01:11,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:11,386 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:11,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1846430897, now seen corresponding path program 1 times [2024-11-01 08:01:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:11,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497824795] [2024-11-01 08:01:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:11,387 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:11,389 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:11,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-01 08:01:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:13,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:13,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-01 08:01:13,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:01:13,886 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497824795] [2024-11-01 08:01:13,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [497824795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:13,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:13,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355956030] [2024-11-01 08:01:13,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:13,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:13,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:13,888 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:13,949 INFO L93 Difference]: Finished difference Result 236 states and 284 transitions. [2024-11-01 08:01:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:13,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 164 [2024-11-01 08:01:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:13,951 INFO L225 Difference]: With dead ends: 236 [2024-11-01 08:01:13,951 INFO L226 Difference]: Without dead ends: 140 [2024-11-01 08:01:13,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:13,952 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:13,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-01 08:01:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-11-01 08:01:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.1484375) internal successors, (147), 128 states have internal predecessors, (147), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-11-01 08:01:13,962 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 164 [2024-11-01 08:01:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:13,963 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-11-01 08:01:13,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-11-01 08:01:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-01 08:01:13,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:13,964 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:14,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-01 08:01:14,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:14,165 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:14,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash -249340725, now seen corresponding path program 2 times [2024-11-01 08:01:14,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:14,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551746417] [2024-11-01 08:01:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:14,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:14,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:14,168 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:14,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-01 08:01:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:16,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:16,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-01 08:01:16,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-01 08:01:16,606 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551746417] [2024-11-01 08:01:16,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [551746417] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:16,606 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:16,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413073794] [2024-11-01 08:01:16,606 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:16,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:16,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:16,609 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:16,641 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2024-11-01 08:01:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:16,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 168 [2024-11-01 08:01:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:16,645 INFO L225 Difference]: With dead ends: 243 [2024-11-01 08:01:16,645 INFO L226 Difference]: Without dead ends: 143 [2024-11-01 08:01:16,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:16,646 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:16,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-01 08:01:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-01 08:01:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 131 states have internal predecessors, (150), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2024-11-01 08:01:16,654 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 168 [2024-11-01 08:01:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:16,654 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2024-11-01 08:01:16,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2024-11-01 08:01:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-01 08:01:16,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:16,655 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:16,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:16,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:16,856 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:16,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1686083527, now seen corresponding path program 1 times [2024-11-01 08:01:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926318343] [2024-11-01 08:01:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:16,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:16,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:16,859 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:16,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-01 08:01:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:19,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:19,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-01 08:01:19,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-01 08:01:19,412 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:19,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926318343] [2024-11-01 08:01:19,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926318343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:19,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:19,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458736507] [2024-11-01 08:01:19,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:19,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:19,414 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:19,469 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2024-11-01 08:01:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:19,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 172 [2024-11-01 08:01:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:19,472 INFO L225 Difference]: With dead ends: 250 [2024-11-01 08:01:19,472 INFO L226 Difference]: Without dead ends: 147 [2024-11-01 08:01:19,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:19,473 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:19,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-01 08:01:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-01 08:01:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2024-11-01 08:01:19,482 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 172 [2024-11-01 08:01:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:19,482 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2024-11-01 08:01:19,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2024-11-01 08:01:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-01 08:01:19,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:19,483 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:19,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-01 08:01:19,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:19,684 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:19,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash 151909571, now seen corresponding path program 2 times [2024-11-01 08:01:19,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:19,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969707973] [2024-11-01 08:01:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:19,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:19,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:19,687 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:19,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-01 08:01:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:22,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:22,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-01 08:01:22,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-01 08:01:22,310 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:22,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969707973] [2024-11-01 08:01:22,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [969707973] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:22,311 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:22,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347678877] [2024-11-01 08:01:22,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:22,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:22,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:22,312 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:22,345 INFO L93 Difference]: Finished difference Result 257 states and 305 transitions. [2024-11-01 08:01:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 176 [2024-11-01 08:01:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:22,348 INFO L225 Difference]: With dead ends: 257 [2024-11-01 08:01:22,348 INFO L226 Difference]: Without dead ends: 150 [2024-11-01 08:01:22,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:22,349 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:22,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-01 08:01:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-01 08:01:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2024-11-01 08:01:22,359 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 176 [2024-11-01 08:01:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:22,360 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2024-11-01 08:01:22,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2024-11-01 08:01:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-01 08:01:22,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:22,360 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:22,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-01 08:01:22,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:22,562 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:22,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:22,562 INFO L85 PathProgramCache]: Analyzing trace with hash -848886977, now seen corresponding path program 1 times [2024-11-01 08:01:22,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:22,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040569412] [2024-11-01 08:01:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:22,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:22,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:22,565 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:22,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-01 08:01:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:25,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:25,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-01 08:01:25,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-01 08:01:25,310 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040569412] [2024-11-01 08:01:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040569412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:25,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:25,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:25,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352544161] [2024-11-01 08:01:25,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:25,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:25,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:25,313 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:25,367 INFO L93 Difference]: Finished difference Result 264 states and 312 transitions. [2024-11-01 08:01:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 180 [2024-11-01 08:01:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:25,371 INFO L225 Difference]: With dead ends: 264 [2024-11-01 08:01:25,371 INFO L226 Difference]: Without dead ends: 154 [2024-11-01 08:01:25,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:25,372 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:25,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-01 08:01:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-11-01 08:01:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 142 states have internal predecessors, (161), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2024-11-01 08:01:25,389 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 180 [2024-11-01 08:01:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:25,389 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2024-11-01 08:01:25,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2024-11-01 08:01:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-01 08:01:25,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:25,390 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:25,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:25,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:25,591 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:25,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1990429765, now seen corresponding path program 2 times [2024-11-01 08:01:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623371531] [2024-11-01 08:01:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:25,592 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:25,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:25,594 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:25,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-01 08:01:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:28,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:28,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-01 08:01:28,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-01 08:01:28,426 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623371531] [2024-11-01 08:01:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [623371531] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:28,426 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028912202] [2024-11-01 08:01:28,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:28,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:28,427 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:28,455 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2024-11-01 08:01:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 184 [2024-11-01 08:01:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:28,458 INFO L225 Difference]: With dead ends: 271 [2024-11-01 08:01:28,458 INFO L226 Difference]: Without dead ends: 157 [2024-11-01 08:01:28,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:28,459 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:28,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-01 08:01:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-01 08:01:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 145 states have internal predecessors, (164), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-11-01 08:01:28,466 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 184 [2024-11-01 08:01:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:28,467 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-11-01 08:01:28,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-11-01 08:01:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-01 08:01:28,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:28,468 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:28,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:28,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:28,671 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:28,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 881112503, now seen corresponding path program 1 times [2024-11-01 08:01:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227357142] [2024-11-01 08:01:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:28,672 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:28,675 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:28,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-01 08:01:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:31,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:31,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-01 08:01:31,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-01 08:01:31,543 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:31,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227357142] [2024-11-01 08:01:31,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227357142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:31,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:31,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940848149] [2024-11-01 08:01:31,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:31,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:31,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:31,545 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:31,608 INFO L93 Difference]: Finished difference Result 278 states and 326 transitions. [2024-11-01 08:01:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 188 [2024-11-01 08:01:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:31,611 INFO L225 Difference]: With dead ends: 278 [2024-11-01 08:01:31,611 INFO L226 Difference]: Without dead ends: 161 [2024-11-01 08:01:31,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:31,612 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:31,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-01 08:01:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-01 08:01:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.1275167785234899) internal successors, (168), 149 states have internal predecessors, (168), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2024-11-01 08:01:31,661 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 188 [2024-11-01 08:01:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:31,661 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2024-11-01 08:01:31,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2024-11-01 08:01:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-01 08:01:31,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:31,662 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:31,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2024-11-01 08:01:31,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:31,863 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:31,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1383884365, now seen corresponding path program 2 times [2024-11-01 08:01:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394147254] [2024-11-01 08:01:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:31,864 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:31,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:31,868 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:31,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-01 08:01:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:34,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:34,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-01 08:01:34,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2024-11-01 08:01:34,753 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:34,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394147254] [2024-11-01 08:01:34,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [394147254] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:34,753 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:34,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:34,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111635665] [2024-11-01 08:01:34,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:34,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:34,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:34,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:34,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:34,755 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:34,781 INFO L93 Difference]: Finished difference Result 285 states and 333 transitions. [2024-11-01 08:01:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 192 [2024-11-01 08:01:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:34,783 INFO L225 Difference]: With dead ends: 285 [2024-11-01 08:01:34,783 INFO L226 Difference]: Without dead ends: 164 [2024-11-01 08:01:34,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:34,786 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:34,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-01 08:01:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-01 08:01:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.125) internal successors, (171), 152 states have internal predecessors, (171), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2024-11-01 08:01:34,794 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 192 [2024-11-01 08:01:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:34,794 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2024-11-01 08:01:34,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2024-11-01 08:01:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-01 08:01:34,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:34,795 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:34,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2024-11-01 08:01:34,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:34,996 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:34,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1159368913, now seen corresponding path program 1 times [2024-11-01 08:01:34,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:34,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230358426] [2024-11-01 08:01:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:34,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:35,000 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:35,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-01 08:01:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:37,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:38,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-01 08:01:38,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2024-11-01 08:01:38,071 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230358426] [2024-11-01 08:01:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [230358426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:38,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554503564] [2024-11-01 08:01:38,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:38,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:38,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:38,077 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:38,135 INFO L93 Difference]: Finished difference Result 292 states and 340 transitions. [2024-11-01 08:01:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 196 [2024-11-01 08:01:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:38,138 INFO L225 Difference]: With dead ends: 292 [2024-11-01 08:01:38,138 INFO L226 Difference]: Without dead ends: 168 [2024-11-01 08:01:38,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:38,139 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:38,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-01 08:01:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2024-11-01 08:01:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 156 states have internal predecessors, (175), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2024-11-01 08:01:38,149 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 196 [2024-11-01 08:01:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:38,149 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2024-11-01 08:01:38,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2024-11-01 08:01:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-01 08:01:38,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:38,150 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-11-01 08:01:38,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-01 08:01:38,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:38,351 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:38,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -265804117, now seen corresponding path program 2 times [2024-11-01 08:01:38,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:38,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287534669] [2024-11-01 08:01:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:38,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:38,354 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:38,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2024-11-01 08:01:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:41,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:41,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2024-11-01 08:01:41,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-11-01 08:01:41,412 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287534669] [2024-11-01 08:01:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287534669] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:41,413 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:41,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406348093] [2024-11-01 08:01:41,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:41,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:41,414 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:41,446 INFO L93 Difference]: Finished difference Result 299 states and 347 transitions. [2024-11-01 08:01:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 200 [2024-11-01 08:01:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:41,448 INFO L225 Difference]: With dead ends: 299 [2024-11-01 08:01:41,448 INFO L226 Difference]: Without dead ends: 171 [2024-11-01 08:01:41,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:41,449 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:41,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-01 08:01:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2024-11-01 08:01:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2024-11-01 08:01:41,459 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 200 [2024-11-01 08:01:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:41,460 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2024-11-01 08:01:41,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2024-11-01 08:01:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2024-11-01 08:01:41,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:41,461 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:41,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2024-11-01 08:01:41,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:41,663 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:41,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash -960106585, now seen corresponding path program 1 times [2024-11-01 08:01:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714242695] [2024-11-01 08:01:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:41,666 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:41,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-01 08:01:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:44,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:44,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:44,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-01 08:01:44,808 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714242695] [2024-11-01 08:01:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [714242695] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:44,808 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110715042] [2024-11-01 08:01:44,809 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:44,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:44,810 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:44,837 INFO L93 Difference]: Finished difference Result 305 states and 353 transitions. [2024-11-01 08:01:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:44,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 204 [2024-11-01 08:01:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:44,840 INFO L225 Difference]: With dead ends: 305 [2024-11-01 08:01:44,840 INFO L226 Difference]: Without dead ends: 174 [2024-11-01 08:01:44,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:44,841 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:44,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-01 08:01:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-01 08:01:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.117283950617284) internal successors, (181), 162 states have internal predecessors, (181), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2024-11-01 08:01:44,858 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 204 [2024-11-01 08:01:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:44,858 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2024-11-01 08:01:44,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2024-11-01 08:01:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-01 08:01:44,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:44,862 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:44,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-01 08:01:45,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:45,063 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:45,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1004530211, now seen corresponding path program 1 times [2024-11-01 08:01:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:45,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112769421] [2024-11-01 08:01:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:45,064 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:45,066 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-01 08:01:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:48,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:48,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:48,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-01 08:01:48,323 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:48,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112769421] [2024-11-01 08:01:48,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112769421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:48,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:48,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:48,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647694904] [2024-11-01 08:01:48,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:48,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:48,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:48,325 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:48,373 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2024-11-01 08:01:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 208 [2024-11-01 08:01:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:48,376 INFO L225 Difference]: With dead ends: 312 [2024-11-01 08:01:48,376 INFO L226 Difference]: Without dead ends: 178 [2024-11-01 08:01:48,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:48,377 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:48,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-01 08:01:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-01 08:01:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1144578313253013) internal successors, (185), 166 states have internal predecessors, (185), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 205 transitions. [2024-11-01 08:01:48,390 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 205 transitions. Word has length 208 [2024-11-01 08:01:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:48,391 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 205 transitions. [2024-11-01 08:01:48,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 205 transitions. [2024-11-01 08:01:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-01 08:01:48,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:48,435 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:48,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2024-11-01 08:01:48,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:48,636 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:48,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1178617503, now seen corresponding path program 2 times [2024-11-01 08:01:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482018915] [2024-11-01 08:01:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:48,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:48,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:48,646 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:48,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-01 08:01:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:51,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:51,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:01:51,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-11-01 08:01:51,963 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482018915] [2024-11-01 08:01:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [482018915] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:51,964 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:51,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417255468] [2024-11-01 08:01:51,964 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:51,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:51,965 INFO L87 Difference]: Start difference. First operand 178 states and 205 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:51,999 INFO L93 Difference]: Finished difference Result 319 states and 367 transitions. [2024-11-01 08:01:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 212 [2024-11-01 08:01:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:52,001 INFO L225 Difference]: With dead ends: 319 [2024-11-01 08:01:52,001 INFO L226 Difference]: Without dead ends: 181 [2024-11-01 08:01:52,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:52,002 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:52,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-01 08:01:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-01 08:01:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 169 states have internal predecessors, (188), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2024-11-01 08:01:52,014 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 212 [2024-11-01 08:01:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:52,014 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2024-11-01 08:01:52,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2024-11-01 08:01:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-01 08:01:52,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:52,015 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:52,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:52,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:52,220 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:52,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1868237669, now seen corresponding path program 1 times [2024-11-01 08:01:52,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:52,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188758642] [2024-11-01 08:01:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:52,223 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:52,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-01 08:01:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:55,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:55,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:01:55,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-11-01 08:01:55,722 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188758642] [2024-11-01 08:01:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [188758642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:55,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:55,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:55,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218393872] [2024-11-01 08:01:55,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:55,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:55,723 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:55,766 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2024-11-01 08:01:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 216 [2024-11-01 08:01:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:55,768 INFO L225 Difference]: With dead ends: 326 [2024-11-01 08:01:55,768 INFO L226 Difference]: Without dead ends: 185 [2024-11-01 08:01:55,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:55,768 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:55,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-01 08:01:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-11-01 08:01:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 173 states have (on average 1.1098265895953756) internal successors, (192), 173 states have internal predecessors, (192), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2024-11-01 08:01:55,777 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 216 [2024-11-01 08:01:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:55,777 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2024-11-01 08:01:55,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2024-11-01 08:01:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-01 08:01:55,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:55,778 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:01:55,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2024-11-01 08:01:55,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:55,979 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:55,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1664465769, now seen corresponding path program 2 times [2024-11-01 08:01:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015908038] [2024-11-01 08:01:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:55,982 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-01 08:01:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:02:00,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-01 08:02:00,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:02:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-01 08:02:01,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:02:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-01 08:02:03,455 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:02:03,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015908038] [2024-11-01 08:02:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015908038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:02:03,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:02:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-01 08:02:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918051896] [2024-11-01 08:02:03,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:02:03,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-01 08:02:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:02:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-01 08:02:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-01 08:02:03,457 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand has 19 states, 17 states have (on average 10.941176470588236) internal successors, (186), 19 states have internal predecessors, (186), 6 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-01 08:02:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:02:04,762 INFO L93 Difference]: Finished difference Result 367 states and 420 transitions. [2024-11-01 08:02:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-01 08:02:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 10.941176470588236) internal successors, (186), 19 states have internal predecessors, (186), 6 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 220 [2024-11-01 08:02:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:02:04,768 INFO L225 Difference]: With dead ends: 367 [2024-11-01 08:02:04,768 INFO L226 Difference]: Without dead ends: 365 [2024-11-01 08:02:04,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2024-11-01 08:02:04,768 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 267 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:02:04,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1266 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-01 08:02:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-01 08:02:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 324. [2024-11-01 08:02:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 307 states have (on average 1.1107491856677525) internal successors, (341), 307 states have internal predecessors, (341), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-01 08:02:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 371 transitions. [2024-11-01 08:02:04,810 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 371 transitions. Word has length 220 [2024-11-01 08:02:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:02:04,816 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 371 transitions. [2024-11-01 08:02:04,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 10.941176470588236) internal successors, (186), 19 states have internal predecessors, (186), 6 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-01 08:02:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 371 transitions. [2024-11-01 08:02:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2024-11-01 08:02:04,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:02:04,819 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-01 08:02:04,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2024-11-01 08:02:05,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:02:05,022 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:02:05,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:02:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1966397108, now seen corresponding path program 3 times [2024-11-01 08:02:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:02:05,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365507719] [2024-11-01 08:02:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:02:05,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:02:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:02:05,027 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:02:05,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process