/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 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-98.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 21:43:54,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 21:43:54,321 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 21:43:54,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 21:43:54,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 21:43:54,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 21:43:54,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 21:43:54,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 21:43:54,364 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 21:43:54,365 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 21:43:54,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 21:43:54,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 21:43:54,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 21:43:54,367 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 21:43:54,367 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 21:43:54,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 21:43:54,368 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 21:43:54,368 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 21:43:54,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 21:43:54,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 21:43:54,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 21:43:54,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 21:43:54,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 21:43:54,371 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 21:43:54,371 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 21:43:54,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 21:43:54,372 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 21:43:54,372 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 21:43:54,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 21:43:54,373 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 21:43:54,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 21:43:54,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 21:43:54,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 21:43:54,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 21:43:54,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 21:43:54,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 21:43:54,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 21:43:54,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 21:43:54,375 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 21:43:54,375 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 21:43:54,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 21:43:54,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 21:43:54,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 21:43:54,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 21:43:54,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:43:54,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 21:43:54,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 21:43:54,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 21:43:54,652 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 21:43:54,653 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 21:43:54,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-98.i [2024-11-02 21:43:56,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 21:43:56,304 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 21:43:56,308 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount100_file-98.i [2024-11-02 21:43:56,320 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e86e0b84a/d382ce6e5c42470582ced2c570d02a4a/FLAGeb3d27d6e [2024-11-02 21:43:56,338 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e86e0b84a/d382ce6e5c42470582ced2c570d02a4a [2024-11-02 21:43:56,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 21:43:56,343 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 21:43:56,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 21:43:56,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 21:43:56,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 21:43:56,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b56c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56, skipping insertion in model container [2024-11-02 21:43:56,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,388 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 21:43:56,574 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-98.i[916,929] [2024-11-02 21:43:56,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 21:43:56,676 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 21:43:56,689 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-98.i[916,929] [2024-11-02 21:43:56,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 21:43:56,742 INFO L204 MainTranslator]: Completed translation [2024-11-02 21:43:56,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56 WrapperNode [2024-11-02 21:43:56,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 21:43:56,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 21:43:56,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 21:43:56,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 21:43:56,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,792 INFO L138 Inliner]: procedures = 27, calls = 36, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 174 [2024-11-02 21:43:56,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 21:43:56,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 21:43:56,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 21:43:56,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 21:43:56,804 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,809 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,829 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]. [2024-11-02 21:43:56,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,856 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 21:43:56,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 21:43:56,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 21:43:56,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 21:43:56,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (1/1) ... [2024-11-02 21:43:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 21:43:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 21:43:56,898 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) [2024-11-02 21:43:56,901 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 [2024-11-02 21:43:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 21:43:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 21:43:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 21:43:56,928 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 21:43:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 21:43:56,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 21:43:57,032 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 21:43:57,034 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 21:44:04,499 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-02 21:44:04,499 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 21:44:04,513 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 21:44:04,513 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 21:44:04,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:44:04 BoogieIcfgContainer [2024-11-02 21:44:04,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 21:44:04,516 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 21:44:04,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 21:44:04,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 21:44:04,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:43:56" (1/3) ... [2024-11-02 21:44:04,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f42496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:44:04, skipping insertion in model container [2024-11-02 21:44:04,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:43:56" (2/3) ... [2024-11-02 21:44:04,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f42496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:44:04, skipping insertion in model container [2024-11-02 21:44:04,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:44:04" (3/3) ... [2024-11-02 21:44:04,520 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount100_file-98.i [2024-11-02 21:44:04,535 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 21:44:04,535 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 21:44:04,618 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 21:44:04,624 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;@29f8f0af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 21:44:04,624 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 21:44:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 52 states have internal predecessors, (73), 23 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-02 21:44:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-02 21:44:04,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 21:44:04,644 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 21:44:04,645 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 21:44:04,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 21:44:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2036502826, now seen corresponding path program 1 times [2024-11-02 21:44:04,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 21:44:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29775293] [2024-11-02 21:44:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 21:44:04,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 21:44:04,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 21:44:04,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 21:44:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 21:44:05,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-02 21:44:05,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 21:44:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2024-11-02 21:44:05,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 21:44:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2024-11-02 21:44:05,810 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 21:44:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29775293] [2024-11-02 21:44:05,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [29775293] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 21:44:05,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 21:44:05,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-02 21:44:05,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787557543] [2024-11-02 21:44:05,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 21:44:05,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 21:44:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 21:44:05,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 21:44:05,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 21:44:05,847 INFO L87 Difference]: Start difference. First operand has 77 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 52 states have internal predecessors, (73), 23 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-02 21:44:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 21:44:05,881 INFO L93 Difference]: Finished difference Result 147 states and 255 transitions. [2024-11-02 21:44:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 21:44:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 2 states have call successors, (23) Word has length 152 [2024-11-02 21:44:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 21:44:05,896 INFO L225 Difference]: With dead ends: 147 [2024-11-02 21:44:05,896 INFO L226 Difference]: Without dead ends: 73 [2024-11-02 21:44:05,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 21:44:05,902 INFO L432 NwaCegarLoop]: 112 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, 112 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 [2024-11-02 21:44:05,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 21:44:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-02 21:44:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-02 21:44:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 23 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-02 21:44:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 112 transitions. [2024-11-02 21:44:05,944 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 112 transitions. Word has length 152 [2024-11-02 21:44:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 21:44:05,944 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 112 transitions. [2024-11-02 21:44:05,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-02 21:44:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 112 transitions. [2024-11-02 21:44:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-02 21:44:05,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 21:44:05,949 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 21:44:05,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 21:44:06,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:06,154 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 21:44:06,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 21:44:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash -317854024, now seen corresponding path program 1 times [2024-11-02 21:44:06,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 21:44:06,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580428017] [2024-11-02 21:44:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 21:44:06,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 21:44:06,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 21:44:06,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 21:44:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 21:44:06,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 21:44:06,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 21:44:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-11-02 21:44:06,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 21:44:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-11-02 21:44:07,228 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 21:44:07,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580428017] [2024-11-02 21:44:07,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [580428017] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 21:44:07,229 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 21:44:07,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-02 21:44:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855416386] [2024-11-02 21:44:07,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 21:44:07,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 21:44:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 21:44:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 21:44:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 21:44:07,234 INFO L87 Difference]: Start difference. First operand 73 states and 112 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2024-11-02 21:44:11,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:44:15,795 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 [] [2024-11-02 21:44:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 21:44:16,188 INFO L93 Difference]: Finished difference Result 211 states and 326 transitions. [2024-11-02 21:44:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 21:44:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 152 [2024-11-02 21:44:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 21:44:16,193 INFO L225 Difference]: With dead ends: 211 [2024-11-02 21:44:16,194 INFO L226 Difference]: Without dead ends: 141 [2024-11-02 21:44:16,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 21:44:16,196 INFO L432 NwaCegarLoop]: 190 mSDtfsCounter, 97 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-02 21:44:16,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 291 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2024-11-02 21:44:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-02 21:44:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-11-02 21:44:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 90 states have internal predecessors, (121), 46 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-11-02 21:44:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 213 transitions. [2024-11-02 21:44:16,222 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 213 transitions. Word has length 152 [2024-11-02 21:44:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 21:44:16,223 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 213 transitions. [2024-11-02 21:44:16,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2024-11-02 21:44:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 213 transitions. [2024-11-02 21:44:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-02 21:44:16,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 21:44:16,227 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 21:44:16,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 21:44:16,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:16,428 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 21:44:16,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 21:44:16,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1457153338, now seen corresponding path program 1 times [2024-11-02 21:44:16,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 21:44:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061753132] [2024-11-02 21:44:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 21:44:16,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 21:44:16,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 21:44:16,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 21:44:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 21:44:16,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 21:44:16,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 21:44:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 498 proven. 24 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2024-11-02 21:44:17,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 21:44:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2024-11-02 21:44:18,820 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 21:44:18,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061753132] [2024-11-02 21:44:18,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1061753132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 21:44:18,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 21:44:18,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-11-02 21:44:18,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862042764] [2024-11-02 21:44:18,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 21:44:18,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 21:44:18,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 21:44:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 21:44:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-02 21:44:18,823 INFO L87 Difference]: Start difference. First operand 139 states and 213 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-02 21:44:24,066 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 [] [2024-11-02 21:44:28,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:44:32,087 WARN L539 Checker$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 [] [2024-11-02 21:44:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 21:44:32,099 INFO L93 Difference]: Finished difference Result 291 states and 437 transitions. [2024-11-02 21:44:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 21:44:32,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 152 [2024-11-02 21:44:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 21:44:32,162 INFO L225 Difference]: With dead ends: 291 [2024-11-02 21:44:32,162 INFO L226 Difference]: Without dead ends: 155 [2024-11-02 21:44:32,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2024-11-02 21:44:32,166 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 169 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2024-11-02 21:44:32,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 195 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 127 Invalid, 3 Unknown, 0 Unchecked, 13.1s Time] [2024-11-02 21:44:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-02 21:44:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2024-11-02 21:44:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.2916666666666667) internal successors, (124), 96 states have internal predecessors, (124), 46 states have call successors, (46), 4 states have call predecessors, (46), 4 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-11-02 21:44:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 216 transitions. [2024-11-02 21:44:32,186 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 216 transitions. Word has length 152 [2024-11-02 21:44:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 21:44:32,187 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 216 transitions. [2024-11-02 21:44:32,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-02 21:44:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 216 transitions. [2024-11-02 21:44:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-02 21:44:32,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 21:44:32,190 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 21:44:32,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 21:44:32,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:32,391 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 21:44:32,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 21:44:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash -337153429, now seen corresponding path program 1 times [2024-11-02 21:44:32,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 21:44:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450717043] [2024-11-02 21:44:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 21:44:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:44:32,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 21:44:32,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 21:44:32,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 21:44:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 21:44:32,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 21:44:32,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 21:44:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 391 proven. 96 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2024-11-02 21:44:40,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 21:44:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-11-02 21:44:44,414 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 21:44:44,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450717043] [2024-11-02 21:44:44,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450717043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 21:44:44,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 21:44:44,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2024-11-02 21:44:44,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992689857] [2024-11-02 21:44:44,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 21:44:44,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-02 21:44:44,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 21:44:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-02 21:44:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2024-11-02 21:44:44,421 INFO L87 Difference]: Start difference. First operand 147 states and 216 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 6 states have call successors, (46), 4 states have call predecessors, (46), 7 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) [2024-11-02 21:44:48,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:44:52,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:44:56,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:45:00,987 WARN L539 Checker$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 [] [2024-11-02 21:45:02,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:45:11,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-02 21:45:12,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-02 21:45:16,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:45:20,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:45:22,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-02 21:45:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 21:45:23,244 INFO L93 Difference]: Finished difference Result 471 states and 684 transitions. [2024-11-02 21:45:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-02 21:45:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 6 states have call successors, (46), 4 states have call predecessors, (46), 7 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) Word has length 153 [2024-11-02 21:45:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 21:45:23,249 INFO L225 Difference]: With dead ends: 471 [2024-11-02 21:45:23,250 INFO L226 Difference]: Without dead ends: 327 [2024-11-02 21:45:23,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2024-11-02 21:45:23,252 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 482 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 202 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2024-11-02 21:45:23,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 435 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 508 Invalid, 6 Unknown, 0 Unchecked, 36.5s Time] [2024-11-02 21:45:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-02 21:45:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 204. [2024-11-02 21:45:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 126 states have (on average 1.2222222222222223) internal successors, (154), 126 states have internal predecessors, (154), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-02 21:45:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2024-11-02 21:45:23,313 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 153 [2024-11-02 21:45:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 21:45:23,314 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2024-11-02 21:45:23,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 6 states have call successors, (46), 4 states have call predecessors, (46), 7 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) [2024-11-02 21:45:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2024-11-02 21:45:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-02 21:45:23,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 21:45:23,317 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 21:45:23,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 21:45:23,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:45:23,518 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 21:45:23,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 21:45:23,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1963669161, now seen corresponding path program 1 times [2024-11-02 21:45:23,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 21:45:23,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466978686] [2024-11-02 21:45:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 21:45:23,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 21:45:23,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 21:45:23,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 21:45:23,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 21:45:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 21:45:23,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 21:45:23,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 21:45:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 456 proven. 45 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-11-02 21:45:26,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 21:45:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2024-11-02 21:45:31,245 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 21:45:31,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466978686] [2024-11-02 21:45:31,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [466978686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 21:45:31,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 21:45:31,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2024-11-02 21:45:31,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369076985] [2024-11-02 21:45:31,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 21:45:31,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-02 21:45:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 21:45:31,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-02 21:45:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-02 21:45:31,248 INFO L87 Difference]: Start difference. First operand 204 states and 292 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46)