/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 Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d32_e0.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 23:49:54,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 23:49:54,521 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-10-31 23:49:54,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 23:49:54,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 23:49:54,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 23:49:54,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 23:49:54,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 23:49:54,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 23:49:54,546 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 23:49:54,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 23:49:54,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 23:49:54,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 23:49:54,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 23:49:54,548 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 23:49:54,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 23:49:54,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 23:49:54,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 23:49:54,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 23:49:54,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 23:49:54,549 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 23:49:54,550 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 23:49:54,550 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 23:49:54,550 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 23:49:54,550 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 23:49:54,550 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 23:49:54,551 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 23:49:54,551 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 23:49:54,551 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 23:49:54,551 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 23:49:54,552 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 23:49:54,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:49:54,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 23:49:54,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 23:49:54,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 23:49:54,553 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 23:49:54,553 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 23:49:54,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 23:49:54,553 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 23:49:54,553 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 23:49:54,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 23:49:54,554 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 23:49:54,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 23:49:54,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 23:49:54,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 23:49:54,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 23:49:54,861 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 23:49:54,861 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 23:49:54,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d32_e0.c [2024-10-31 23:49:56,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 23:49:56,487 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 23:49:56,488 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d32_e0.c [2024-10-31 23:49:56,505 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f48d389c/d9c320a2ea42431d87ed39d7ed30b5f1/FLAG25bdc8933 [2024-10-31 23:49:56,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f48d389c/d9c320a2ea42431d87ed39d7ed30b5f1 [2024-10-31 23:49:56,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 23:49:56,523 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 23:49:56,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 23:49:56,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 23:49:56,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 23:49:56,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:49:56" (1/1) ... [2024-10-31 23:49:56,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686de32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:56, skipping insertion in model container [2024-10-31 23:49:56,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:49:56" (1/1) ... [2024-10-31 23:49:56,587 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 23:49:56,764 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d32_e0.c[1325,1338] [2024-10-31 23:49:57,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:49:57,204 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 23:49:57,213 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d32_e0.c[1325,1338] [2024-10-31 23:49:57,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:49:57,416 INFO L204 MainTranslator]: Completed translation [2024-10-31 23:49:57,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57 WrapperNode [2024-10-31 23:49:57,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 23:49:57,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 23:49:57,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 23:49:57,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 23:49:57,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,576 INFO L138 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3151 [2024-10-31 23:49:57,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 23:49:57,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 23:49:57,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 23:49:57,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 23:49:57,585 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,606 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,661 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]. [2024-10-31 23:49:57,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 23:49:57,747 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 23:49:57,747 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 23:49:57,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 23:49:57,747 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (1/1) ... [2024-10-31 23:49:57,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:49:57,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 23:49:57,785 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) [2024-10-31 23:49:57,837 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 [2024-10-31 23:49:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 23:49:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 23:49:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 23:49:57,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 23:49:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 23:49:57,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 23:49:58,264 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 23:49:58,266 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 23:50:00,462 INFO L? ?]: Removed 1145 outVars from TransFormulas that were not future-live. [2024-10-31 23:50:00,462 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 23:50:00,472 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 23:50:00,472 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 23:50:00,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:50:00 BoogieIcfgContainer [2024-10-31 23:50:00,473 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 23:50:00,475 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 23:50:00,475 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 23:50:00,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 23:50:00,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 11:49:56" (1/3) ... [2024-10-31 23:50:00,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e2af6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:50:00, skipping insertion in model container [2024-10-31 23:50:00,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:49:57" (2/3) ... [2024-10-31 23:50:00,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e2af6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:50:00, skipping insertion in model container [2024-10-31 23:50:00,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:50:00" (3/3) ... [2024-10-31 23:50:00,480 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n2_w64_d32_e0.c [2024-10-31 23:50:00,491 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 23:50:00,491 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 23:50:00,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 23:50:00,544 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;@18a2f370, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 23:50:00,545 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 23:50:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 23:50:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 23:50:00,553 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:50:00,554 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:50:00,554 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:50:00,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:50:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1387212075, now seen corresponding path program 1 times [2024-10-31 23:50:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:50:00,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115015180] [2024-10-31 23:50:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:50:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 23:50:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 23:50:02,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 23:50:02,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 23:50:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 23:50:02,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 23:50:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 23:50:02,885 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 23:50:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115015180] [2024-10-31 23:50:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115015180] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 23:50:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 23:50:02,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-10-31 23:50:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082805079] [2024-10-31 23:50:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 23:50:02,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 23:50:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 23:50:02,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 23:50:02,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:50:02,914 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 23:50:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 23:50:02,929 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2024-10-31 23:50:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 23:50:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-10-31 23:50:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 23:50:02,935 INFO L225 Difference]: With dead ends: 51 [2024-10-31 23:50:02,935 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 23:50:02,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:50:02,941 INFO L432 NwaCegarLoop]: 31 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, 31 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 [2024-10-31 23:50:02,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 23:50:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 23:50:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-31 23:50:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 23:50:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-31 23:50:02,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 47 [2024-10-31 23:50:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 23:50:02,969 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-31 23:50:02,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 23:50:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-31 23:50:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 23:50:02,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:50:02,971 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:50:02,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 23:50:02,972 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:50:02,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:50:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 971432711, now seen corresponding path program 1 times [2024-10-31 23:50:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:50:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000111363] [2024-10-31 23:50:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:50:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms