/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w16_d64_e0.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 21:47:12,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 21:47:12,982 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 21:47:12,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 21:47:12,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 21:47:13,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 21:47:13,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 21:47:13,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 21:47:13,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 21:47:13,021 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 21:47:13,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 21:47:13,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 21:47:13,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 21:47:13,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 21:47:13,023 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 21:47:13,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 21:47:13,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 21:47:13,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 21:47:13,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 21:47:13,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 21:47:13,028 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 21:47:13,029 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 21:47:13,029 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 21:47:13,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 21:47:13,030 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 21:47:13,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 21:47:13,030 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 21:47:13,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 21:47:13,031 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 21:47:13,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 21:47:13,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 21:47:13,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 21:47:13,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 21:47:13,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 21:47:13,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 21:47:13,035 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 21:47:13,035 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:13,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 21:47:13,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 21:47:13,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 21:47:13,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 21:47:13,036 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:13,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 21:47:13,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 21:47:13,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 21:47:13,329 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 21:47:13,330 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 21:47:13,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w16_d64_e0.c [2024-11-04 21:47:14,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 21:47:15,247 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 21:47:15,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w16_d64_e0.c [2024-11-04 21:47:15,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a9e51ff/baf16799d3874a9384aa46c6fb08a5bd/FLAG521e343db [2024-11-04 21:47:15,297 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a9e51ff/baf16799d3874a9384aa46c6fb08a5bd [2024-11-04 21:47:15,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 21:47:15,302 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 21:47:15,304 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 21:47:15,304 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 21:47:15,311 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 21:47:15,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 09:47:15" (1/1) ... [2024-11-04 21:47:15,313 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456ce290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:15, skipping insertion in model container [2024-11-04 21:47:15,313 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 09:47:15" (1/1) ... [2024-11-04 21:47:15,397 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 21:47:15,604 WARN L250 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.circular_pointer_top_w16_d64_e0.c[1280,1293] [2024-11-04 21:47:16,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 21:47:16,063 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 21:47:16,075 WARN L250 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.circular_pointer_top_w16_d64_e0.c[1280,1293] [2024-11-04 21:47:16,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 21:47:16,213 INFO L204 MainTranslator]: Completed translation [2024-11-04 21:47:16,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16 WrapperNode [2024-11-04 21:47:16,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 21:47:16,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 21:47:16,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 21:47:16,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 21:47:16,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,389 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2549 [2024-11-04 21:47:16,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 21:47:16,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 21:47:16,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 21:47:16,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 21:47:16,401 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,478 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-04 21:47:16,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,478 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,537 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,557 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 21:47:16,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 21:47:16,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 21:47:16,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 21:47:16,601 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (1/1) ... [2024-11-04 21:47:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 21:47:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 21:47:16,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-04 21:47:16,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-04 21:47:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 21:47:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 21:47:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 21:47:16,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 21:47:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 21:47:16,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 21:47:17,142 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 21:47:17,144 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 21:47:19,181 INFO L? ?]: Removed 705 outVars from TransFormulas that were not future-live. [2024-11-04 21:47:19,181 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 21:47:19,193 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 21:47:19,193 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-04 21:47:19,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 09:47:19 BoogieIcfgContainer [2024-11-04 21:47:19,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 21:47:19,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 21:47:19,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 21:47:19,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 21:47:19,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 09:47:15" (1/3) ... [2024-11-04 21:47:19,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4180dddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 09:47:19, skipping insertion in model container [2024-11-04 21:47:19,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 09:47:16" (2/3) ... [2024-11-04 21:47:19,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4180dddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 09:47:19, skipping insertion in model container [2024-11-04 21:47:19,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 09:47:19" (3/3) ... [2024-11-04 21:47:19,202 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.circular_pointer_top_w16_d64_e0.c [2024-11-04 21:47:19,220 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 21:47:19,220 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 21:47:19,279 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 21:47:19,284 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;@37eacc33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 21:47:19,285 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 21:47:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-04 21:47:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-04 21:47:19,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:47:19,296 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:47:19,297 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:47:19,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:47:19,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1944675641, now seen corresponding path program 1 times [2024-11-04 21:47:19,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:47:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329316126] [2024-11-04 21:47:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:47:19,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:47:19,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:47:19,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-04 21:47:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:47:20,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 21:47:20,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:47:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-04 21:47:20,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:47:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-04 21:47:20,594 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:47:20,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329316126] [2024-11-04 21:47:20,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329316126] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 21:47:20,595 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 21:47:20,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-04 21:47:20,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946813403] [2024-11-04 21:47:20,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 21:47:20,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 21:47:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:47:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 21:47:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 21:47:20,626 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-04 21:47:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:47:20,644 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-04 21:47:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 21:47:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-11-04 21:47:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:47:20,652 INFO L225 Difference]: With dead ends: 35 [2024-11-04 21:47:20,652 INFO L226 Difference]: Without dead ends: 17 [2024-11-04 21:47:20,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 21:47:20,662 INFO L432 NwaCegarLoop]: 19 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, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 21:47:20,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 21:47:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-04 21:47:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-04 21:47:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-04 21:47:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-04 21:47:20,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 23 [2024-11-04 21:47:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:47:20,701 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-04 21:47:20,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-04 21:47:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-04 21:47:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-04 21:47:20,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:47:20,704 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:47:20,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-04 21:47:20,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:20,905 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:47:20,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:47:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 265954675, now seen corresponding path program 1 times [2024-11-04 21:47:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:47:20,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554806357] [2024-11-04 21:47:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:47:20,906 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:47:20,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:47:20,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-04 21:47:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:47:22,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-04 21:47:22,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:47:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-04 21:47:22,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:47:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-04 21:47:22,640 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:47:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554806357] [2024-11-04 21:47:22,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554806357] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 21:47:22,641 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 21:47:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-04 21:47:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905532313] [2024-11-04 21:47:22,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 21:47:22,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 21:47:22,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:47:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 21:47:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-04 21:47:22,645 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-04 21:47:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:47:23,144 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-04 21:47:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 21:47:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23 [2024-11-04 21:47:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:47:23,146 INFO L225 Difference]: With dead ends: 27 [2024-11-04 21:47:23,146 INFO L226 Difference]: Without dead ends: 25 [2024-11-04 21:47:23,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-04 21:47:23,147 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-04 21:47:23,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-04 21:47:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-04 21:47:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-04 21:47:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 21:47:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-04 21:47:23,159 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2024-11-04 21:47:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:47:23,162 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-04 21:47:23,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-04 21:47:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-04 21:47:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-04 21:47:23,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:47:23,165 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-04 21:47:23,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-04 21:47:23,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:23,366 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:47:23,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:47:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 416519459, now seen corresponding path program 1 times [2024-11-04 21:47:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:47:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267760003] [2024-11-04 21:47:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:47:23,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:47:23,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:47:23,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-04 21:47:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:47:25,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-04 21:47:25,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:47:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-04 21:47:26,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:47:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-04 21:47:28,194 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:47:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267760003] [2024-11-04 21:47:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267760003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 21:47:28,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 21:47:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-04 21:47:28,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964300234] [2024-11-04 21:47:28,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 21:47:28,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-04 21:47:28,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:47:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-04 21:47:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-04 21:47:28,197 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-04 21:47:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:47:29,260 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-11-04 21:47:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-04 21:47:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 44 [2024-11-04 21:47:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:47:29,263 INFO L225 Difference]: With dead ends: 36 [2024-11-04 21:47:29,263 INFO L226 Difference]: Without dead ends: 34 [2024-11-04 21:47:29,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-04 21:47:29,264 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-04 21:47:29,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 65 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-04 21:47:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-04 21:47:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-04 21:47:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-04 21:47:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-04 21:47:29,280 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 44 [2024-11-04 21:47:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:47:29,281 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-04 21:47:29,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-04 21:47:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-04 21:47:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-04 21:47:29,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:47:29,283 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-11-04 21:47:29,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-04 21:47:29,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:29,486 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:47:29,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:47:29,487 INFO L85 PathProgramCache]: Analyzing trace with hash 223728499, now seen corresponding path program 2 times [2024-11-04 21:47:29,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:47:29,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890730836] [2024-11-04 21:47:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:47:29,487 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:47:29,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:47:29,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:47:29,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-04 21:47:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:47:33,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 2452 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-04 21:47:33,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:47:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-04 21:47:36,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:47:43,457 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse7 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_1~0#1|))) (let ((.cse4 (= (_ bv0 8) |c_ULTIMATE.start_main_~state_374~0#1|)) (.cse5 (forall ((|v_ULTIMATE.start_main_~var_397_arg_0~0#1_18| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_393_arg_1~0#1_17| (_ BitVec 8))) (= (_ bv0 8) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_397_arg_0~0#1_18|) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_393_arg_1~0#1_17|))))))))) .cse7)))))) (let ((.cse10 (or .cse4 .cse5)) (.cse11 (not .cse4)) (.cse12 ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_351~0#1|))) (let ((.cse1 (and .cse10 (or .cse11 (forall ((|v_ULTIMATE.start_main_~var_354_arg_1~0#1_17| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_368_arg_1~0#1_17| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_397_arg_0~0#1_18| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_357_arg_1~0#1_17| (_ BitVec 8))) (= (_ bv0 8) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_397_arg_0~0#1_18|) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_357_arg_1~0#1_17|) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse12 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_354_arg_1~0#1_17|))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_368_arg_1~0#1_17|))))))) (_ bv0 32)))))))))))) .cse7))))))) (.cse2 ((_ zero_extend 16) |c_ULTIMATE.start_main_~mask_SORT_3~0#1|)) (.cse3 ((_ zero_extend 16) |c_ULTIMATE.start_main_~state_370~0#1|))) (let ((.cse8 (= (_ bv0 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_13~0#1|) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_12~0#1|)))))))) (.cse6 (let ((.cse9 (= ((_ zero_extend 16) ((_ extract 15 0) (bvand ((_ zero_extend 16) ((_ extract 15 0) ((_ zero_extend 16) |c_ULTIMATE.start_main_~state_338~0#1|))) .cse2))) .cse3))) (and (or .cse9 .cse1) (or (not .cse9) (and .cse10 (or .cse11 (forall ((|v_ULTIMATE.start_main_~var_354_arg_1~0#1_17| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_368_arg_1~0#1_17| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_397_arg_0~0#1_18| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_357_arg_1~0#1_17| (_ BitVec 8))) (= ((_ extract 7 0) (bvand .cse7 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_397_arg_0~0#1_18|) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_357_arg_1~0#1_17|) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse12 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_354_arg_1~0#1_17|))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_368_arg_1~0#1_17|))))))) (_ bv1 32)))))))))))))) (_ bv0 8)))))))))) (and (or (let ((.cse0 (= ((_ extract 7 0) (bvand .cse7 (_ bv254 32))) (_ bv0 8)))) (and (or (not .cse0) (and (or .cse1 (forall ((|v_ULTIMATE.start_main_~var_341_arg_2~0#1_16| (_ BitVec 16))) (= ((_ zero_extend 16) ((_ extract 15 0) (bvand ((_ zero_extend 16) ((_ extract 15 0) ((_ zero_extend 16) |v_ULTIMATE.start_main_~var_341_arg_2~0#1_16|))) .cse2))) .cse3))) (or (forall ((|v_ULTIMATE.start_main_~var_341_arg_2~0#1_16| (_ BitVec 16))) (not (= ((_ zero_extend 16) ((_ extract 15 0) (bvand ((_ zero_extend 16) ((_ extract 15 0) ((_ zero_extend 16) |v_ULTIMATE.start_main_~var_341_arg_2~0#1_16|))) .cse2))) .cse3))) .cse4 .cse5))) (or .cse0 .cse6))) .cse8) (or (= (_ bv0 8) ((_ extract 7 0) (bvand .cse7 (_ bv255 32)))) (not .cse8) .cse6))))))) is different from false [2024-11-04 21:48:04,015 WARN L286 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 523 DAG size of output: 516 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)