/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-11-01 05:42:47,967 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 05:42:48,054 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-01 05:42:48,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 05:42:48,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 05:42:48,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 05:42:48,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 05:42:48,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 05:42:48,090 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 05:42:48,091 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 05:42:48,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 05:42:48,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 05:42:48,092 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 05:42:48,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 05:42:48,096 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 05:42:48,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 05:42:48,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 05:42:48,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 05:42:48,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 05:42:48,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 05:42:48,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 05:42:48,100 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 05:42:48,100 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 05:42:48,100 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 05:42:48,100 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 05:42:48,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 05:42:48,101 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 05:42:48,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 05:42:48,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 05:42:48,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 05:42:48,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 05:42:48,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 05:42:48,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 05:42:48,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 05:42:48,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 05:42:48,104 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 05:42:48,104 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 05:42:48,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 05:42:48,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 05:42:48,105 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 05:42:48,105 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 05:42:48,106 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 05:42:48,106 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:48,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 05:42:48,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 05:42:48,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 05:42:48,469 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 05:42:48,469 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 05:42:48,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c [2024-11-01 05:42:50,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 05:42:50,223 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 05:42:50,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c [2024-11-01 05:42:50,235 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99cc858a/c6648af068cb4f5392ed270b07d9e8f8/FLAG77617eea0 [2024-11-01 05:42:50,251 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99cc858a/c6648af068cb4f5392ed270b07d9e8f8 [2024-11-01 05:42:50,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 05:42:50,254 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 05:42:50,255 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 05:42:50,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 05:42:50,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 05:42:50,259 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,260 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c1ac57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50, skipping insertion in model container [2024-11-01 05:42:50,260 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,287 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 05:42:50,460 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c[1266,1279] [2024-11-01 05:42:50,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 05:42:50,562 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 05:42:50,572 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c[1266,1279] [2024-11-01 05:42:50,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 05:42:50,647 INFO L204 MainTranslator]: Completed translation [2024-11-01 05:42:50,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50 WrapperNode [2024-11-01 05:42:50,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 05:42:50,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 05:42:50,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 05:42:50,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 05:42:50,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,702 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 266 [2024-11-01 05:42:50,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 05:42:50,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 05:42:50,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 05:42:50,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 05:42:50,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,717 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,735 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]. [2024-11-01 05:42:50,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,766 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 05:42:50,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 05:42:50,771 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 05:42:50,771 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 05:42:50,772 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (1/1) ... [2024-11-01 05:42:50,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 05:42:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 05:42:50,797 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) [2024-11-01 05:42:50,800 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 [2024-11-01 05:42:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 05:42:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 05:42:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 05:42:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 05:42:50,930 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 05:42:50,932 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 05:42:51,190 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-01 05:42:51,190 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 05:42:51,203 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 05:42:51,203 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-01 05:42:51,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 05:42:51 BoogieIcfgContainer [2024-11-01 05:42:51,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 05:42:51,206 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 05:42:51,206 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 05:42:51,209 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 05:42:51,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 05:42:50" (1/3) ... [2024-11-01 05:42:51,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdd4092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 05:42:51, skipping insertion in model container [2024-11-01 05:42:51,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 05:42:50" (2/3) ... [2024-11-01 05:42:51,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdd4092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 05:42:51, skipping insertion in model container [2024-11-01 05:42:51,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 05:42:51" (3/3) ... [2024-11-01 05:42:51,212 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c [2024-11-01 05:42:51,224 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 05:42:51,225 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 05:42:51,267 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 05:42:51,272 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;@b1444dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 05:42:51,273 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 05:42:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-01 05:42:51,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 05:42:51,281 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-01 05:42:51,282 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 05:42:51,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 05:42:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash 28694789, now seen corresponding path program 1 times [2024-11-01 05:42:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 05:42:51,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728455395] [2024-11-01 05:42:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 05:42:51,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:51,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 05:42:51,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-01 05:42:51,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-01 05:42:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 05:42:51,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-01 05:42:51,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 05:42:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:51,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 05:42:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:51,867 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 05:42:51,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728455395] [2024-11-01 05:42:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728455395] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 05:42:51,868 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 05:42:51,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-01 05:42:51,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369017942] [2024-11-01 05:42:51,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 05:42:51,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-01 05:42:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 05:42:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-01 05:42:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-01 05:42:51,900 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 05:42:51,954 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2024-11-01 05:42:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 05:42:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-01 05:42:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 05:42:51,964 INFO L225 Difference]: With dead ends: 18 [2024-11-01 05:42:51,964 INFO L226 Difference]: Without dead ends: 10 [2024-11-01 05:42:51,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-01 05:42:51,971 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 05:42:51,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 05:42:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-01 05:42:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2024-11-01 05:42:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-11-01 05:42:52,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2024-11-01 05:42:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 05:42:52,002 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-11-01 05:42:52,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-11-01 05:42:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-01 05:42:52,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 05:42:52,004 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-01 05:42:52,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-01 05:42:52,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:52,205 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 05:42:52,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 05:42:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash 152739811, now seen corresponding path program 1 times [2024-11-01 05:42:52,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 05:42:52,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821539746] [2024-11-01 05:42:52,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 05:42:52,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:52,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 05:42:52,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-01 05:42:52,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-01 05:42:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 05:42:52,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-01 05:42:52,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 05:42:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:52,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 05:42:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:53,074 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 05:42:53,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821539746] [2024-11-01 05:42:53,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [821539746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 05:42:53,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 05:42:53,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-01 05:42:53,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316426237] [2024-11-01 05:42:53,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 05:42:53,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-01 05:42:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 05:42:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-01 05:42:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-01 05:42:53,079 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 05:42:53,172 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-11-01 05:42:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 05:42:53,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-01 05:42:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 05:42:53,173 INFO L225 Difference]: With dead ends: 15 [2024-11-01 05:42:53,174 INFO L226 Difference]: Without dead ends: 13 [2024-11-01 05:42:53,174 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-01 05:42:53,175 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 05:42:53,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 05:42:53,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-01 05:42:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2024-11-01 05:42:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-11-01 05:42:53,183 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2024-11-01 05:42:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 05:42:53,184 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-11-01 05:42:53,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-11-01 05:42:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-01 05:42:53,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 05:42:53,185 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-01 05:42:53,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-01 05:42:53,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:53,386 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 05:42:53,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 05:42:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1906115653, now seen corresponding path program 2 times [2024-11-01 05:42:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 05:42:53,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213053483] [2024-11-01 05:42:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 05:42:53,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:53,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 05:42:53,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-01 05:42:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-01 05:42:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 05:42:53,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-01 05:42:53,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 05:42:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:53,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 05:42:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:57,537 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 05:42:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213053483] [2024-11-01 05:42:57,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213053483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 05:42:57,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 05:42:57,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-01 05:42:57,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752638762] [2024-11-01 05:42:57,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 05:42:57,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-01 05:42:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 05:42:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-01 05:42:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-01 05:42:57,541 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 05:42:57,660 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2024-11-01 05:42:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 05:42:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-01 05:42:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 05:42:57,663 INFO L225 Difference]: With dead ends: 18 [2024-11-01 05:42:57,663 INFO L226 Difference]: Without dead ends: 16 [2024-11-01 05:42:57,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2024-11-01 05:42:57,664 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 05:42:57,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 05:42:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-01 05:42:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-01 05:42:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-01 05:42:57,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2024-11-01 05:42:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 05:42:57,672 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-01 05:42:57,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:42:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-01 05:42:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-01 05:42:57,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 05:42:57,673 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2024-11-01 05:42:57,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-01 05:42:57,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:57,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 05:42:57,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 05:42:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1333570723, now seen corresponding path program 3 times [2024-11-01 05:42:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 05:42:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810456344] [2024-11-01 05:42:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 05:42:57,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:42:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 05:42:57,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-01 05:42:57,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-01 05:42:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 05:42:58,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-01 05:42:58,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 05:42:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:42:58,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 05:43:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:43:11,963 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 05:43:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810456344] [2024-11-01 05:43:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1810456344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 05:43:11,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 05:43:11,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-01 05:43:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169528574] [2024-11-01 05:43:11,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 05:43:11,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-01 05:43:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 05:43:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-01 05:43:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-01 05:43:11,965 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:43:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 05:43:12,125 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2024-11-01 05:43:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 05:43:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-01 05:43:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 05:43:12,126 INFO L225 Difference]: With dead ends: 21 [2024-11-01 05:43:12,126 INFO L226 Difference]: Without dead ends: 19 [2024-11-01 05:43:12,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2024-11-01 05:43:12,128 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 05:43:12,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 05:43:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-01 05:43:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-11-01 05:43:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:43:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2024-11-01 05:43:12,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2024-11-01 05:43:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 05:43:12,133 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2024-11-01 05:43:12,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-01 05:43:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2024-11-01 05:43:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-01 05:43:12,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 05:43:12,134 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-11-01 05:43:12,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-01 05:43:12,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:43:12,335 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 05:43:12,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 05:43:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash -37306491, now seen corresponding path program 4 times [2024-11-01 05:43:12,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 05:43:12,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060619173] [2024-11-01 05:43:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 05:43:12,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-01 05:43:12,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 05:43:12,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-01 05:43:12,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-01 05:43:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 05:43:12,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-01 05:43:12,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 05:43:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-01 05:43:12,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 05:44:23,887 WARN L286 SmtUtils]: Spent 17.63s on a formula simplification. DAG size of input: 798 DAG size of output: 795 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)