/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.safe_linked_list_fifo_n2d4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 23:44:42,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 23:44:42,502 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 23:44:42,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 23:44:42,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 23:44:42,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 23:44:42,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 23:44:42,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 23:44:42,531 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 23:44:42,531 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 23:44:42,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 23:44:42,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 23:44:42,532 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 23:44:42,532 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 23:44:42,532 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 23:44:42,533 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 23:44:42,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 23:44:42,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 23:44:42,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 23:44:42,534 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 23:44:42,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 23:44:42,534 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 23:44:42,534 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 23:44:42,535 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 23:44:42,535 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 23:44:42,535 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 23:44:42,535 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 23:44:42,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 23:44:42,536 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 23:44:42,536 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 23:44:42,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 23:44:42,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:44:42,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 23:44:42,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 23:44:42,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 23:44:42,537 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 23:44:42,537 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 23:44:42,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 23:44:42,538 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 23:44:42,538 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 23:44:42,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 23:44:42,540 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 23:44:42,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 23:44:42,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 23:44:42,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 23:44:42,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 23:44:42,817 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 23:44:42,818 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 23:44:42,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2024-10-31 23:44:44,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 23:44:44,293 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 23:44:44,293 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2024-10-31 23:44:44,312 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e211a1f7e/5442afb5e90842ad92c686230391599b/FLAGdbf749d68 [2024-10-31 23:44:44,329 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e211a1f7e/5442afb5e90842ad92c686230391599b [2024-10-31 23:44:44,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 23:44:44,332 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 23:44:44,334 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 23:44:44,334 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 23:44:44,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 23:44:44,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:44,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e89f7b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44, skipping insertion in model container [2024-10-31 23:44:44,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:44,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 23:44:44,554 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c[1266,1279] [2024-10-31 23:44:44,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:44:44,788 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 23:44:44,796 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c[1266,1279] [2024-10-31 23:44:44,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:44:44,909 INFO L204 MainTranslator]: Completed translation [2024-10-31 23:44:44,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44 WrapperNode [2024-10-31 23:44:44,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 23:44:44,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 23:44:44,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 23:44:44,912 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 23:44:44,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:44,951 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,017 INFO L138 Inliner]: procedures = 18, calls = 107, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1594 [2024-10-31 23:44:45,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 23:44:45,018 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 23:44:45,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 23:44:45,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 23:44:45,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,045 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,100 INFO L175 MemorySlicer]: Split 63 memory accesses to 4 slices as follows [2, 24, 29, 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, 12, 14, 4]. [2024-10-31 23:44:45,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,158 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 23:44:45,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 23:44:45,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 23:44:45,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 23:44:45,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (1/1) ... [2024-10-31 23:44:45,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:44:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 23:44:45,232 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 23:44:45,236 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 23:44:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 23:44:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-10-31 23:44:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 23:44:45,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 23:44:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 23:44:45,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 23:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-10-31 23:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-10-31 23:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-10-31 23:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2024-10-31 23:44:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 23:44:45,468 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 23:44:45,470 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 23:44:46,392 INFO L? ?]: Removed 1019 outVars from TransFormulas that were not future-live. [2024-10-31 23:44:46,392 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 23:44:46,403 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 23:44:46,403 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-10-31 23:44:46,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:44:46 BoogieIcfgContainer [2024-10-31 23:44:46,403 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 23:44:46,405 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 23:44:46,405 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 23:44:46,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 23:44:46,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 11:44:44" (1/3) ... [2024-10-31 23:44:46,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5743f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:44:46, skipping insertion in model container [2024-10-31 23:44:46,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:44:44" (2/3) ... [2024-10-31 23:44:46,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5743f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:44:46, skipping insertion in model container [2024-10-31 23:44:46,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:44:46" (3/3) ... [2024-10-31 23:44:46,411 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2024-10-31 23:44:46,423 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 23:44:46,423 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 23:44:46,470 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 23:44:46,475 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;@2a984ae3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 23:44:46,476 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 23:44:46,479 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 23:44:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 23:44:46,484 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:44:46,485 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 23:44:46,485 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:44:46,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:44:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash -958431594, now seen corresponding path program 1 times [2024-10-31 23:44:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:44:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820082202] [2024-10-31 23:44:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:44:46,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 23:44:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 23:44:46,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 23:44:46,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 23:44:46,824 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 23:44:46,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 23:44:46,871 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 23:44:46,872 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 23:44:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820082202] [2024-10-31 23:44:46,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [820082202] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 23:44:46,873 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 23:44:46,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-10-31 23:44:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963303518] [2024-10-31 23:44:46,875 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 23:44:46,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 23:44:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 23:44:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 23:44:46,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:44:46,899 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 23:44:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 23:44:46,922 INFO L93 Difference]: Finished difference Result 149 states and 237 transitions. [2024-10-31 23:44:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 23:44:46,925 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 23:44:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 23:44:46,930 INFO L225 Difference]: With dead ends: 149 [2024-10-31 23:44:46,931 INFO L226 Difference]: Without dead ends: 75 [2024-10-31 23:44:46,933 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 23:44:46,936 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 23:44:46,938 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 23:44:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-31 23:44:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-31 23:44:46,963 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 23:44:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2024-10-31 23:44:46,965 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 41 [2024-10-31 23:44:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 23:44:46,966 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2024-10-31 23:44:46,966 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 23:44:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2024-10-31 23:44:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 23:44:46,967 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:44:46,967 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 23:44:46,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 23:44:46,968 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:44:46,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:44:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2099855424, now seen corresponding path program 1 times [2024-10-31 23:44:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:44:46,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410737802] [2024-10-31 23:44:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:44:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 23:45:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 23:45:58,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 23:45:58,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 23:45:58,965 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 23:45:58,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 23:45:59,018 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 23:45:59,019 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 23:45:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410737802] [2024-10-31 23:45:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [410737802] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 23:45:59,019 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 23:45:59,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 23:45:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958477606] [2024-10-31 23:45:59,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 23:45:59,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 23:45:59,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 23:45:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 23:45:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 23:45:59,023 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-10-31 23:45:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 23:45:59,057 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2024-10-31 23:45:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 23:45:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 41 [2024-10-31 23:45:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 23:45:59,060 INFO L225 Difference]: With dead ends: 149 [2024-10-31 23:45:59,060 INFO L226 Difference]: Without dead ends: 78 [2024-10-31 23:45:59,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 23:45:59,061 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 23:45:59,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 279 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 23:45:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-31 23:45:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-31 23:45:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 23:45:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2024-10-31 23:45:59,073 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 41 [2024-10-31 23:45:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 23:45:59,073 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2024-10-31 23:45:59,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-10-31 23:45:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2024-10-31 23:45:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 23:45:59,074 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:45:59,074 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:45:59,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 23:45:59,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:45:59,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:45:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 963432764, now seen corresponding path program 1 times [2024-10-31 23:45:59,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:45:59,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978459911] [2024-10-31 23:45:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:45:59,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms