/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-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 22:41:14,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 22:41:14,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 22:41:14,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 22:41:14,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 22:41:14,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 22:41:14,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 22:41:14,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 22:41:14,219 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 22:41:14,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 22:41:14,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 22:41:14,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 22:41:14,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 22:41:14,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 22:41:14,221 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 22:41:14,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 22:41:14,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 22:41:14,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 22:41:14,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 22:41:14,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 22:41:14,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 22:41:14,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 22:41:14,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 22:41:14,228 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 22:41:14,228 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 22:41:14,228 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 22:41:14,228 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 22:41:14,229 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 22:41:14,229 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 22:41:14,229 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 22:41:14,229 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 22:41:14,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 22:41:14,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 22:41:14,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 22:41:14,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:41:14,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 22:41:14,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 22:41:14,231 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 22:41:14,231 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 22:41:14,231 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 22:41:14,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 22:41:14,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 22:41:14,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 22:41:14,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 22:41:14,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:14,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 22:41:14,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 22:41:14,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 22:41:14,485 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 22:41:14,486 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 22:41:14,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2024-11-02 22:41:15,953 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 22:41:16,120 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 22:41:16,121 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2024-11-02 22:41:16,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88cd15345/36a3bcefeef349f9b17e3503fa16a352/FLAG215d6cf57 [2024-11-02 22:41:16,519 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88cd15345/36a3bcefeef349f9b17e3503fa16a352 [2024-11-02 22:41:16,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 22:41:16,522 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 22:41:16,523 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 22:41:16,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 22:41:16,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 22:41:16,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b665b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16, skipping insertion in model container [2024-11-02 22:41:16,531 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,547 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 22:41:16,708 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c[838,851] [2024-11-02 22:41:16,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:41:16,721 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 22:41:16,734 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c[838,851] [2024-11-02 22:41:16,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:41:16,750 INFO L204 MainTranslator]: Completed translation [2024-11-02 22:41:16,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16 WrapperNode [2024-11-02 22:41:16,751 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 22:41:16,752 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 22:41:16,752 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 22:41:16,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 22:41:16,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,779 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2024-11-02 22:41:16,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 22:41:16,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 22:41:16,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 22:41:16,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 22:41:16,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,790 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,799 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]. [2024-11-02 22:41:16,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,799 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,804 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 22:41:16,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 22:41:16,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 22:41:16,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 22:41:16,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (1/1) ... [2024-11-02 22:41:16,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:41:16,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:16,839 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) [2024-11-02 22:41:16,842 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 [2024-11-02 22:41:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 22:41:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2024-11-02 22:41:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2024-11-02 22:41:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 22:41:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 22:41:16,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 22:41:16,925 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 22:41:16,928 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 22:41:17,059 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-02 22:41:17,059 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 22:41:17,076 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 22:41:17,076 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 22:41:17,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:41:17 BoogieIcfgContainer [2024-11-02 22:41:17,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 22:41:17,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 22:41:17,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 22:41:17,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 22:41:17,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:41:16" (1/3) ... [2024-11-02 22:41:17,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8b5081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:41:17, skipping insertion in model container [2024-11-02 22:41:17,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:16" (2/3) ... [2024-11-02 22:41:17,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8b5081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:41:17, skipping insertion in model container [2024-11-02 22:41:17,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:41:17" (3/3) ... [2024-11-02 22:41:17,085 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2024-11-02 22:41:17,113 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 22:41:17,113 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 22:41:17,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 22:41:17,163 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;@269d9781, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 22:41:17,164 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 22:41:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 22:41:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 22:41:17,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:17,174 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:17,174 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:17,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2024-11-02 22:41:17,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:17,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028811918] [2024-11-02 22:41:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:17,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:17,194 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) [2024-11-02 22:41:17,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 22:41:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:17,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:41:17,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:41:17,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:41:17,750 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028811918] [2024-11-02 22:41:17,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028811918] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:41:17,751 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:41:17,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2024-11-02 22:41:17,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553748073] [2024-11-02 22:41:17,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:41:17,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 22:41:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:17,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 22:41:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:41:17,789 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 22:41:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:17,934 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-02 22:41:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 22:41:17,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2024-11-02 22:41:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:17,945 INFO L225 Difference]: With dead ends: 26 [2024-11-02 22:41:17,945 INFO L226 Difference]: Without dead ends: 16 [2024-11-02 22:41:17,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:41:17,954 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:17,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-02 22:41:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-02 22:41:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 22:41:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-02 22:41:17,990 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-02 22:41:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:17,991 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-02 22:41:17,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 22:41:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-02 22:41:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 22:41:17,992 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:17,993 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:18,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:18,193 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 [2024-11-02 22:41:18,194 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:18,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2024-11-02 22:41:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035810518] [2024-11-02 22:41:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:18,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:18,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:18,198 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) [2024-11-02 22:41:18,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 22:41:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:18,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 22:41:18,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 22:41:18,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 22:41:18,840 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:18,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035810518] [2024-11-02 22:41:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035810518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:18,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:18,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-02 22:41:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659863163] [2024-11-02 22:41:18,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:18,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-02 22:41:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-02 22:41:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-02 22:41:18,844 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-02 22:41:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:19,170 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-02 22:41:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 22:41:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2024-11-02 22:41:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:19,173 INFO L225 Difference]: With dead ends: 28 [2024-11-02 22:41:19,173 INFO L226 Difference]: Without dead ends: 22 [2024-11-02 22:41:19,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-02 22:41:19,174 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:19,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 64 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:41:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-02 22:41:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-02 22:41:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 22:41:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-02 22:41:19,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2024-11-02 22:41:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:19,186 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-02 22:41:19,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-02 22:41:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-02 22:41:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 22:41:19,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:19,189 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:19,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 22:41:19,390 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 [2024-11-02 22:41:19,390 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:19,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2024-11-02 22:41:19,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:19,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551367721] [2024-11-02 22:41:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:19,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:19,394 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) [2024-11-02 22:41:19,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 22:41:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:19,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 22:41:19,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 22:41:19,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 22:41:20,751 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:20,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551367721] [2024-11-02 22:41:20,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [551367721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:20,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:20,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2024-11-02 22:41:20,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511270999] [2024-11-02 22:41:20,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:20,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-02 22:41:20,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-02 22:41:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-11-02 22:41:20,754 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-02 22:41:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:21,298 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-02 22:41:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-02 22:41:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2024-11-02 22:41:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:21,300 INFO L225 Difference]: With dead ends: 34 [2024-11-02 22:41:21,300 INFO L226 Difference]: Without dead ends: 28 [2024-11-02 22:41:21,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 22:41:21,302 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:21,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 109 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:41:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-02 22:41:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-02 22:41:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 22:41:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-11-02 22:41:21,315 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2024-11-02 22:41:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:21,315 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-11-02 22:41:21,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-02 22:41:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-11-02 22:41:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-02 22:41:21,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:21,316 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:21,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 22:41:21,517 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 [2024-11-02 22:41:21,518 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:21,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2024-11-02 22:41:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:21,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485855625] [2024-11-02 22:41:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:21,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:21,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:21,520 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) [2024-11-02 22:41:21,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 22:41:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:21,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-02 22:41:21,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-02 22:41:21,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 22:41:23,707 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:23,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485855625] [2024-11-02 22:41:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [485855625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:23,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:23,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2024-11-02 22:41:23,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654609669] [2024-11-02 22:41:23,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:23,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-02 22:41:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-02 22:41:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 22:41:23,711 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:24,496 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-11-02 22:41:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-02 22:41:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2024-11-02 22:41:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:24,499 INFO L225 Difference]: With dead ends: 40 [2024-11-02 22:41:24,499 INFO L226 Difference]: Without dead ends: 34 [2024-11-02 22:41:24,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2024-11-02 22:41:24,501 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:24,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 176 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 22:41:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-02 22:41:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-02 22:41:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-02 22:41:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-02 22:41:24,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2024-11-02 22:41:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:24,513 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-02 22:41:24,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-02 22:41:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 22:41:24,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:24,515 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:24,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 22:41:24,719 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 [2024-11-02 22:41:24,720 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:24,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2024-11-02 22:41:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150042558] [2024-11-02 22:41:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:24,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:24,723 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) [2024-11-02 22:41:24,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 22:41:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:24,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-02 22:41:24,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-02 22:41:25,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-02 22:41:27,824 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150042558] [2024-11-02 22:41:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [150042558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:27,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:27,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2024-11-02 22:41:27,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470338116] [2024-11-02 22:41:27,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:27,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-02 22:41:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-02 22:41:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2024-11-02 22:41:27,829 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-02 22:41:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:28,805 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2024-11-02 22:41:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-02 22:41:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2024-11-02 22:41:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:28,808 INFO L225 Difference]: With dead ends: 46 [2024-11-02 22:41:28,808 INFO L226 Difference]: Without dead ends: 40 [2024-11-02 22:41:28,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=399, Invalid=3633, Unknown=0, NotChecked=0, Total=4032 [2024-11-02 22:41:28,810 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:28,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 308 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 22:41:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-02 22:41:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-02 22:41:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-02 22:41:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-02 22:41:28,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2024-11-02 22:41:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:28,828 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-02 22:41:28,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-02 22:41:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-02 22:41:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-02 22:41:28,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:28,831 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:28,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 22:41:29,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:29,033 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:29,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2024-11-02 22:41:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:29,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043625419] [2024-11-02 22:41:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:29,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:29,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:29,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:29,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 22:41:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:29,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-02 22:41:29,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-02 22:41:29,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 22:41:32,720 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043625419] [2024-11-02 22:41:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043625419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:32,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2024-11-02 22:41:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688375498] [2024-11-02 22:41:32,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:32,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-02 22:41:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-02 22:41:32,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2024-11-02 22:41:32,723 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-02 22:41:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:34,190 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-11-02 22:41:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-02 22:41:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2024-11-02 22:41:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:34,192 INFO L225 Difference]: With dead ends: 52 [2024-11-02 22:41:34,192 INFO L226 Difference]: Without dead ends: 46 [2024-11-02 22:41:34,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=537, Invalid=5469, Unknown=0, NotChecked=0, Total=6006 [2024-11-02 22:41:34,195 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:34,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 516 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 22:41:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-02 22:41:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-02 22:41:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-02 22:41:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-02 22:41:34,202 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2024-11-02 22:41:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:34,203 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-02 22:41:34,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-02 22:41:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-02 22:41:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-02 22:41:34,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:34,205 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:34,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:34,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:34,406 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:34,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2024-11-02 22:41:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:34,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008719273] [2024-11-02 22:41:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:34,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:34,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:34,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 22:41:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:34,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-02 22:41:34,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-02 22:41:34,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-02 22:41:39,184 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008719273] [2024-11-02 22:41:39,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008719273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:39,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:39,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2024-11-02 22:41:39,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573733889] [2024-11-02 22:41:39,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:39,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-02 22:41:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-02 22:41:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2024-11-02 22:41:39,188 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-02 22:41:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:41,119 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2024-11-02 22:41:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-02 22:41:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2024-11-02 22:41:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:41,120 INFO L225 Difference]: With dead ends: 58 [2024-11-02 22:41:41,120 INFO L226 Difference]: Without dead ends: 52 [2024-11-02 22:41:41,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=691, Invalid=7681, Unknown=0, NotChecked=0, Total=8372 [2024-11-02 22:41:41,123 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:41,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 585 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 22:41:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-02 22:41:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-02 22:41:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-02 22:41:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-02 22:41:41,131 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2024-11-02 22:41:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:41,132 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-02 22:41:41,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-02 22:41:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-02 22:41:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-02 22:41:41,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:41,136 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:41,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:41,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:41,337 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:41,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2024-11-02 22:41:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:41,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373575885] [2024-11-02 22:41:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:41,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:41,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 22:41:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:41,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-02 22:41:41,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-02 22:41:42,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-02 22:41:47,693 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:47,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373575885] [2024-11-02 22:41:47,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [373575885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:47,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:47,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2024-11-02 22:41:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587433007] [2024-11-02 22:41:47,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:47,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-02 22:41:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-02 22:41:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2024-11-02 22:41:47,697 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-02 22:41:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:49,873 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2024-11-02 22:41:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-02 22:41:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2024-11-02 22:41:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:49,874 INFO L225 Difference]: With dead ends: 64 [2024-11-02 22:41:49,875 INFO L226 Difference]: Without dead ends: 58 [2024-11-02 22:41:49,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=861, Invalid=10269, Unknown=0, NotChecked=0, Total=11130 [2024-11-02 22:41:49,878 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:49,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 737 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 22:41:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-02 22:41:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-02 22:41:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-02 22:41:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-11-02 22:41:49,886 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2024-11-02 22:41:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:49,886 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-11-02 22:41:49,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-02 22:41:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-11-02 22:41:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-02 22:41:49,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:49,888 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:49,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:50,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:50,089 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:50,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2024-11-02 22:41:50,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:50,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175262846] [2024-11-02 22:41:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:50,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:50,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:50,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 22:41:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:50,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-02 22:41:50,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-02 22:41:50,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-02 22:41:57,795 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:57,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175262846] [2024-11-02 22:41:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175262846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:57,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:57,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2024-11-02 22:41:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942665213] [2024-11-02 22:41:57,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:57,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-02 22:41:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-02 22:41:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2024-11-02 22:41:57,799 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2024-11-02 22:42:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:42:00,518 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2024-11-02 22:42:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-02 22:42:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2024-11-02 22:42:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:42:00,520 INFO L225 Difference]: With dead ends: 70 [2024-11-02 22:42:00,520 INFO L226 Difference]: Without dead ends: 64 [2024-11-02 22:42:00,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1047, Invalid=13233, Unknown=0, NotChecked=0, Total=14280 [2024-11-02 22:42:00,523 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:42:00,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 923 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 22:42:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-02 22:42:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-02 22:42:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-02 22:42:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-11-02 22:42:00,535 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2024-11-02 22:42:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:42:00,535 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-11-02 22:42:00,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2024-11-02 22:42:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-11-02 22:42:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-02 22:42:00,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:42:00,537 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:42:00,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-02 22:42:00,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:00,737 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:42:00,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:42:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2024-11-02 22:42:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:42:00,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380718279] [2024-11-02 22:42:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:42:00,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:00,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:42:00,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:42:00,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-02 22:42:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:42:00,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-02 22:42:00,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:42:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-11-02 22:42:01,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:42:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-02 22:42:10,154 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:42:10,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380718279] [2024-11-02 22:42:10,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1380718279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:42:10,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:42:10,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2024-11-02 22:42:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790439403] [2024-11-02 22:42:10,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:42:10,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-02 22:42:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:42:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-02 22:42:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2024-11-02 22:42:10,158 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-02 22:42:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:42:13,430 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2024-11-02 22:42:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-02 22:42:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2024-11-02 22:42:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:42:13,431 INFO L225 Difference]: With dead ends: 76 [2024-11-02 22:42:13,432 INFO L226 Difference]: Without dead ends: 70 [2024-11-02 22:42:13,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1249, Invalid=16573, Unknown=0, NotChecked=0, Total=17822 [2024-11-02 22:42:13,434 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 438 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:42:13,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1072 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-02 22:42:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-02 22:42:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-02 22:42:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2024-11-02 22:42:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-02 22:42:13,443 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2024-11-02 22:42:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:42:13,443 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-02 22:42:13,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-02 22:42:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-02 22:42:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-02 22:42:13,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:42:13,445 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:42:13,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-02 22:42:13,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:13,646 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:42:13,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:42:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 685850484, now seen corresponding path program 10 times [2024-11-02 22:42:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:42:13,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337154503] [2024-11-02 22:42:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:42:13,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:13,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:42:13,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:42:13,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-02 22:42:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:42:13,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-02 22:42:13,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:42:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-11-02 22:42:14,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:42:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-02 22:42:25,447 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:42:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337154503] [2024-11-02 22:42:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337154503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:42:25,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:42:25,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2024-11-02 22:42:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672266518] [2024-11-02 22:42:25,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:42:25,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-02 22:42:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:42:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-02 22:42:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2024-11-02 22:42:25,451 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2024-11-02 22:42:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:42:29,406 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2024-11-02 22:42:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-02 22:42:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) Word has length 125 [2024-11-02 22:42:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:42:29,408 INFO L225 Difference]: With dead ends: 82 [2024-11-02 22:42:29,408 INFO L226 Difference]: Without dead ends: 76 [2024-11-02 22:42:29,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2856 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1467, Invalid=20289, Unknown=0, NotChecked=0, Total=21756 [2024-11-02 22:42:29,411 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 284 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-02 22:42:29,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1283 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-02 22:42:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-02 22:42:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-02 22:42:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-02 22:42:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-11-02 22:42:29,424 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2024-11-02 22:42:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:42:29,424 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-11-02 22:42:29,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2024-11-02 22:42:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-11-02 22:42:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-02 22:42:29,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:42:29,426 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:42:29,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-02 22:42:29,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:29,627 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:42:29,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:42:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 11 times [2024-11-02 22:42:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:42:29,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238044099] [2024-11-02 22:42:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:42:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:42:29,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:42:29,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-02 22:42:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:42:29,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-02 22:42:29,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:42:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-11-02 22:42:30,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:42:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-02 22:42:43,805 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:42:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238044099] [2024-11-02 22:42:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [238044099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:42:43,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:42:43,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2024-11-02 22:42:43,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16356598] [2024-11-02 22:42:43,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:42:43,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-02 22:42:43,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:42:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-02 22:42:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2024-11-02 22:42:43,809 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44)