/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-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-23.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 00:55:23,823 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 00:55:23,882 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 00:55:23,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 00:55:23,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 00:55:23,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 00:55:23,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 00:55:23,913 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 00:55:23,914 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 00:55:23,915 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 00:55:23,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 00:55:23,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 00:55:23,916 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 00:55:23,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 00:55:23,917 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 00:55:23,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 00:55:23,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 00:55:23,917 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 00:55:23,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 00:55:23,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 00:55:23,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 00:55:23,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 00:55:23,922 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 00:55:23,922 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 00:55:23,922 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 00:55:23,922 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 00:55:23,922 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 00:55:23,922 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 00:55:23,923 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 00:55:23,923 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 00:55:23,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 00:55:23,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 00:55:23,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 00:55:23,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 00:55:23,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 00:55:23,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 00:55:23,924 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 00:55:23,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 00:55:23,924 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 00:55:23,925 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 00:55:23,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 00:55:23,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 00:55:23,927 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 00:55:23,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 00:55:23,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 00:55:24,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 00:55:24,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 00:55:24,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 00:55:24,162 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 00:55:24,162 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 00:55:24,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-23.i [2024-11-03 00:55:25,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 00:55:25,629 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 00:55:25,630 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-23.i [2024-11-03 00:55:25,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54af7bd8f/4ffceb7a19574b4bb9f9ed72dce1c2b4/FLAG323881de7 [2024-11-03 00:55:25,650 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54af7bd8f/4ffceb7a19574b4bb9f9ed72dce1c2b4 [2024-11-03 00:55:25,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 00:55:25,654 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 00:55:25,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 00:55:25,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 00:55:25,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 00:55:25,659 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 12:55:25" (1/1) ... [2024-11-03 00:55:25,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be23536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:25, skipping insertion in model container [2024-11-03 00:55:25,660 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 12:55:25" (1/1) ... [2024-11-03 00:55:25,691 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 00:55:25,822 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-23.i[916,929] [2024-11-03 00:55:25,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 00:55:25,895 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 00:55:25,905 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-23.i[916,929] [2024-11-03 00:55:25,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 00:55:26,027 INFO L204 MainTranslator]: Completed translation [2024-11-03 00:55:26,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26 WrapperNode [2024-11-03 00:55:26,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 00:55:26,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 00:55:26,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 00:55:26,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 00:55:26,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,085 INFO L138 Inliner]: procedures = 27, calls = 48, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 227 [2024-11-03 00:55:26,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 00:55:26,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 00:55:26,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 00:55:26,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 00:55:26,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,113 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-03 00:55:26,114 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,114 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,133 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 00:55:26,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 00:55:26,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 00:55:26,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 00:55:26,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (1/1) ... [2024-11-03 00:55:26,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 00:55:26,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:55:26,178 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) [2024-11-03 00:55:26,182 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 [2024-11-03 00:55:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 00:55:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 00:55:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-03 00:55:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-03 00:55:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 00:55:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 00:55:26,288 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 00:55:26,290 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 00:55:33,751 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-11-03 00:55:33,751 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 00:55:33,764 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 00:55:33,764 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-03 00:55:33,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 12:55:33 BoogieIcfgContainer [2024-11-03 00:55:33,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 00:55:33,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 00:55:33,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 00:55:33,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 00:55:33,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 12:55:25" (1/3) ... [2024-11-03 00:55:33,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea22261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 12:55:33, skipping insertion in model container [2024-11-03 00:55:33,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:55:26" (2/3) ... [2024-11-03 00:55:33,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea22261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 12:55:33, skipping insertion in model container [2024-11-03 00:55:33,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 12:55:33" (3/3) ... [2024-11-03 00:55:33,771 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount100_file-23.i [2024-11-03 00:55:33,782 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 00:55:33,782 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 00:55:33,823 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 00:55:33,828 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;@2878b86a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 00:55:33,828 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 00:55:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-03 00:55:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-03 00:55:33,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:55:33,844 INFO L215 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:55:33,845 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:55:33,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:55:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1104040980, now seen corresponding path program 1 times [2024-11-03 00:55:33,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:55:33,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712287057] [2024-11-03 00:55:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:55:33,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 00:55:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 00:55:33,861 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) [2024-11-03 00:55:33,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 00:55:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:55:34,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 00:55:34,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:55:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2024-11-03 00:55:34,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:55:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2024-11-03 00:55:35,810 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:55:35,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712287057] [2024-11-03 00:55:35,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1712287057] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:55:35,810 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:55:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-03 00:55:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256779973] [2024-11-03 00:55:35,812 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:55:35,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-03 00:55:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:55:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-03 00:55:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-03 00:55:35,834 INFO L87 Difference]: Start difference. First operand has 99 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2024-11-03 00:55:40,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:55:44,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:55:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:55:44,250 INFO L93 Difference]: Finished difference Result 279 states and 512 transitions. [2024-11-03 00:55:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-03 00:55:44,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 223 [2024-11-03 00:55:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:55:44,272 INFO L225 Difference]: With dead ends: 279 [2024-11-03 00:55:44,272 INFO L226 Difference]: Without dead ends: 183 [2024-11-03 00:55:44,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-03 00:55:44,284 INFO L432 NwaCegarLoop]: 244 mSDtfsCounter, 124 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-03 00:55:44,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 377 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2024-11-03 00:55:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-03 00:55:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 109. [2024-11-03 00:55:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.375) internal successors, (99), 72 states have internal predecessors, (99), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-03 00:55:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 169 transitions. [2024-11-03 00:55:44,409 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 169 transitions. Word has length 223 [2024-11-03 00:55:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:55:44,410 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 169 transitions. [2024-11-03 00:55:44,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2024-11-03 00:55:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 169 transitions. [2024-11-03 00:55:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-03 00:55:44,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:55:44,416 INFO L215 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:55:44,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-03 00:55:44,621 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 [2024-11-03 00:55:44,622 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:55:44,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:55:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1103290734, now seen corresponding path program 1 times [2024-11-03 00:55:44,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:55:44,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080956572] [2024-11-03 00:55:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:55:44,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 00:55:44,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 00:55:44,626 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) [2024-11-03 00:55:44,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 00:55:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:55:46,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 00:55:46,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:55:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 718 proven. 84 refuted. 0 times theorem prover too weak. 1578 trivial. 0 not checked. [2024-11-03 00:55:52,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:55:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2024-11-03 00:55:55,817 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:55:55,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080956572] [2024-11-03 00:55:55,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1080956572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:55:55,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:55:55,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-11-03 00:55:55,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870789447] [2024-11-03 00:55:55,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:55:55,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 00:55:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:55:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 00:55:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-03 00:55:55,820 INFO L87 Difference]: Start difference. First operand 109 states and 169 transitions. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2024-11-03 00:56:03,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:56:07,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:56:11,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:56:13,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:56:22,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 00:56:26,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 00:56:30,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 00:56:34,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 00:56:38,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-11-03 00:56:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:56:38,424 INFO L93 Difference]: Finished difference Result 340 states and 525 transitions. [2024-11-03 00:56:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-03 00:56:38,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 223 [2024-11-03 00:56:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:56:38,428 INFO L225 Difference]: With dead ends: 340 [2024-11-03 00:56:38,428 INFO L226 Difference]: Without dead ends: 234 [2024-11-03 00:56:38,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 433 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2024-11-03 00:56:38,432 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 439 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 178 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.6s IncrementalHoareTripleChecker+Time [2024-11-03 00:56:38,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 567 Invalid, 935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [178 Valid, 749 Invalid, 8 Unknown, 0 Unchecked, 41.6s Time] [2024-11-03 00:56:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-03 00:56:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2024-11-03 00:56:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 104 states have internal predecessors, (132), 70 states have call successors, (70), 3 states have call predecessors, (70), 3 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-03 00:56:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 272 transitions. [2024-11-03 00:56:38,472 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 272 transitions. Word has length 223 [2024-11-03 00:56:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:56:38,473 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 272 transitions. [2024-11-03 00:56:38,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2024-11-03 00:56:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 272 transitions. [2024-11-03 00:56:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-03 00:56:38,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:56:38,476 INFO L215 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:56:38,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-03 00:56:38,680 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 [2024-11-03 00:56:38,681 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:56:38,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:56:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash 285642284, now seen corresponding path program 1 times [2024-11-03 00:56:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:56:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609140253] [2024-11-03 00:56:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:56:38,683 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 00:56:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 00:56:38,685 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) [2024-11-03 00:56:38,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 00:56:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:56:41,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-03 00:56:41,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:56:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1134 proven. 36 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2024-11-03 00:56:42,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:56:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2024-11-03 00:56:44,200 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:56:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609140253] [2024-11-03 00:56:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [609140253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:56:44,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:56:44,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-03 00:56:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260792311] [2024-11-03 00:56:44,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:56:44,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 00:56:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:56:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 00:56:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-03 00:56:44,205 INFO L87 Difference]: Start difference. First operand 178 states and 272 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 2 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2024-11-03 00:56:50,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:56:54,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:56:58,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:57:03,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:57:07,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-03 00:57:11,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []