/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-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 23:44:51,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 23:44:51,305 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 23:44:51,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 23:44:51,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 23:44:51,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 23:44:51,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 23:44:51,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 23:44:51,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 23:44:51,352 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 23:44:51,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 23:44:51,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 23:44:51,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 23:44:51,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 23:44:51,356 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 23:44:51,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 23:44:51,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 23:44:51,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 23:44:51,357 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 23:44:51,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 23:44:51,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 23:44:51,361 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 23:44:51,361 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 23:44:51,361 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 23:44:51,361 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 23:44:51,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 23:44:51,362 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 23:44:51,362 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 23:44:51,362 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 23:44:51,363 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 23:44:51,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 23:44:51,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:44:51,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 23:44:51,364 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 23:44:51,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 23:44:51,365 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 23:44:51,365 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 23:44:51,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 23:44:51,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 23:44:51,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 23:44:51,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 23:44:51,367 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 23:44:51,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 23:44:51,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 23:44:51,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 23:44:51,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 23:44:51,716 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 23:44:51,716 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 23:44:51,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-10-31 23:44:53,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 23:44:53,466 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 23:44:53,466 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-10-31 23:44:53,486 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c82ce1c/632152deb9e34287ab4644b31fab6e20/FLAG7ede5b632 [2024-10-31 23:44:53,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c82ce1c/632152deb9e34287ab4644b31fab6e20 [2024-10-31 23:44:53,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 23:44:53,508 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 23:44:53,511 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 23:44:53,511 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 23:44:53,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 23:44:53,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:44:53" (1/1) ... [2024-10-31 23:44:53,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2af31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:53, skipping insertion in model container [2024-10-31 23:44:53,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:44:53" (1/1) ... [2024-10-31 23:44:53,572 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 23:44:53,760 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1268,1281] [2024-10-31 23:44:54,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:44:54,076 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 23:44:54,087 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1268,1281] [2024-10-31 23:44:54,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:44:54,225 INFO L204 MainTranslator]: Completed translation [2024-10-31 23:44:54,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54 WrapperNode [2024-10-31 23:44:54,228 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 23:44:54,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 23:44:54,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 23:44:54,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 23:44:54,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,368 INFO L138 Inliner]: procedures = 18, calls = 107, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1594 [2024-10-31 23:44:54,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 23:44:54,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 23:44:54,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 23:44:54,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 23:44:54,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,393 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,440 INFO L175 MemorySlicer]: Split 63 memory accesses to 4 slices as follows [2, 29, 24, 8]. 46 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 30 writes are split as follows [0, 14, 12, 4]. [2024-10-31 23:44:54,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,487 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,494 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,506 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 23:44:54,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 23:44:54,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 23:44:54,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 23:44:54,536 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (1/1) ... [2024-10-31 23:44:54,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:44:54,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 23:44:54,561 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 23:44:54,569 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 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-31 23:44:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 23:44:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 23:44:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-10-31 23:44:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2024-10-31 23:44:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 23:44:54,870 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 23:44:54,872 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 23:44:56,110 INFO L? ?]: Removed 1019 outVars from TransFormulas that were not future-live. [2024-10-31 23:44:56,111 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 23:44:56,126 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 23:44:56,126 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-10-31 23:44:56,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:44:56 BoogieIcfgContainer [2024-10-31 23:44:56,127 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 23:44:56,129 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 23:44:56,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 23:44:56,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 23:44:56,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 11:44:53" (1/3) ... [2024-10-31 23:44:56,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0e558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:44:56, skipping insertion in model container [2024-10-31 23:44:56,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:54" (2/3) ... [2024-10-31 23:44:56,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0e558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:44:56, skipping insertion in model container [2024-10-31 23:44:56,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:44:56" (3/3) ... [2024-10-31 23:44:56,134 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-10-31 23:44:56,147 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 23:44:56,147 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 23:44:56,202 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 23:44:56,208 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;@520aed2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 23:44:56,209 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 23:44:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 23:44:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 23:44:56,219 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:44:56,220 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:44:56,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:44:56,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:44:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash -958431594, now seen corresponding path program 1 times [2024-10-31 23:44:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:44:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265394658] [2024-10-31 23:44:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:44:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 23:44:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 23:44:56,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 23:44:56,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 23:44:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 23:44:56,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 23:44:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 23:44:56,696 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 23:44:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265394658] [2024-10-31 23:44:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [265394658] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 23:44:56,698 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 23:44:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-10-31 23:44:56,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839610637] [2024-10-31 23:44:56,700 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 23:44:56,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 23:44:56,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 23:44:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 23:44:56,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:44:56,719 INFO L87 Difference]: Start difference. First operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-10-31 23:44:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 23:44:56,743 INFO L93 Difference]: Finished difference Result 149 states and 237 transitions. [2024-10-31 23:44:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 23:44:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 41 [2024-10-31 23:44:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 23:44:56,749 INFO L225 Difference]: With dead ends: 149 [2024-10-31 23:44:56,750 INFO L226 Difference]: Without dead ends: 75 [2024-10-31 23:44:56,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:44:56,755 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 23:44:56,756 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 23:44:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-31 23:44:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-31 23:44:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 23:44:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2024-10-31 23:44:56,790 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 41 [2024-10-31 23:44:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 23:44:56,790 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2024-10-31 23:44:56,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-10-31 23:44:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2024-10-31 23:44:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 23:44:56,792 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:44:56,792 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:44:56,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 23:44:56,792 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:44:56,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:44:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2099855424, now seen corresponding path program 1 times [2024-10-31 23:44:56,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:44:56,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149647619] [2024-10-31 23:44:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:44:56,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms