/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 --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_analog_estimation_convergence.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-17387ad-m [2024-11-06 16:15:07,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 16:15:08,022 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-06 16:15:08,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 16:15:08,031 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 16:15:08,054 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 16:15:08,055 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 16:15:08,055 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 16:15:08,056 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 16:15:08,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 16:15:08,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 16:15:08,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 16:15:08,059 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 16:15:08,060 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 16:15:08,060 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 16:15:08,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 16:15:08,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 16:15:08,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 16:15:08,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 16:15:08,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 16:15:08,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 16:15:08,066 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-06 16:15:08,066 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-06 16:15:08,067 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 16:15:08,067 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-06 16:15:08,067 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 16:15:08,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 16:15:08,068 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 16:15:08,068 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 16:15:08,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 16:15:08,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 16:15:08,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 16:15:08,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 16:15:08,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 16:15:08,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 16:15:08,070 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-06 16:15:08,070 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:08,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 16:15:08,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 16:15:08,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 16:15:08,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 16:15:08,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX [2024-11-06 16:15:08,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 16:15:08,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 16:15:08,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 16:15:08,316 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 16:15:08,316 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 16:15:08,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_analog_estimation_convergence.c [2024-11-06 16:15:09,780 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 16:15:09,985 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 16:15:09,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_analog_estimation_convergence.c [2024-11-06 16:15:09,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176b75980/c7a5257aa8de4f83b4a5a8e74a90dfa9/FLAGace8a5dad [2024-11-06 16:15:10,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176b75980/c7a5257aa8de4f83b4a5a8e74a90dfa9 [2024-11-06 16:15:10,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 16:15:10,346 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-06 16:15:10,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 16:15:10,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 16:15:10,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 16:15:10,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b815e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10, skipping insertion in model container [2024-11-06 16:15:10,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 16:15:10,562 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_analog_estimation_convergence.c[1287,1300] [2024-11-06 16:15:10,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 16:15:10,715 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 16:15:10,727 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_analog_estimation_convergence.c[1287,1300] [2024-11-06 16:15:10,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 16:15:10,823 INFO L204 MainTranslator]: Completed translation [2024-11-06 16:15:10,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10 WrapperNode [2024-11-06 16:15:10,823 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 16:15:10,824 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 16:15:10,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 16:15:10,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 16:15:10,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,847 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,878 INFO L138 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 427 [2024-11-06 16:15:10,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 16:15:10,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 16:15:10,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 16:15:10,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 16:15:10,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,897 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,916 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]. [2024-11-06 16:15:10,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 16:15:10,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 16:15:10,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 16:15:10,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 16:15:10,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (1/1) ... [2024-11-06 16:15:10,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 16:15:10,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:10,982 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) [2024-11-06 16:15:10,993 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 [2024-11-06 16:15:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 16:15:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-06 16:15:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 16:15:11,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 16:15:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 16:15:11,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 16:15:11,166 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 16:15:11,168 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 16:15:11,653 INFO L? ?]: Removed 178 outVars from TransFormulas that were not future-live. [2024-11-06 16:15:11,654 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 16:15:11,668 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 16:15:11,668 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-06 16:15:11,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:15:11 BoogieIcfgContainer [2024-11-06 16:15:11,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 16:15:11,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 16:15:11,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 16:15:11,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 16:15:11,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 04:15:10" (1/3) ... [2024-11-06 16:15:11,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450fc817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:15:11, skipping insertion in model container [2024-11-06 16:15:11,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:10" (2/3) ... [2024-11-06 16:15:11,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450fc817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:15:11, skipping insertion in model container [2024-11-06 16:15:11,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:15:11" (3/3) ... [2024-11-06 16:15:11,678 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.safe_analog_estimation_convergence.c [2024-11-06 16:15:11,690 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 16:15:11,691 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 16:15:11,731 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 16:15:11,737 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;@4f1f8acb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 16:15:11,737 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 16:15:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2024-11-06 16:15:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-06 16:15:11,746 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:11,746 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 16:15:11,746 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:11,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash 896107007, now seen corresponding path program 1 times [2024-11-06 16:15:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:11,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112295415] [2024-11-06 16:15:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:11,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:11,769 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) [2024-11-06 16:15:11,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-06 16:15:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:12,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-06 16:15:12,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 16:15:12,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:12,595 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112295415] [2024-11-06 16:15:12,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112295415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:12,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366313990] [2024-11-06 16:15:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:12,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:12,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-06 16:15:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:12,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-06 16:15:12,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 16:15:13,095 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 16:15:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366313990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 16:15:13,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 16:15:13,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2024-11-06 16:15:13,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016223793] [2024-11-06 16:15:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 16:15:13,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 16:15:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 16:15:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-06 16:15:13,126 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 16:15:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:13,269 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2024-11-06 16:15:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 16:15:13,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-11-06 16:15:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:13,278 INFO L225 Difference]: With dead ends: 38 [2024-11-06 16:15:13,278 INFO L226 Difference]: Without dead ends: 22 [2024-11-06 16:15:13,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-06 16:15:13,287 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:13,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 16:15:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-06 16:15:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-06 16:15:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-06 16:15:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-06 16:15:13,329 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2024-11-06 16:15:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:13,330 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-06 16:15:13,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 16:15:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-06 16:15:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-06 16:15:13,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:13,333 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-06 16:15:13,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-06 16:15:13,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:13,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:13,735 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:13,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash 91156387, now seen corresponding path program 1 times [2024-11-06 16:15:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:13,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297979218] [2024-11-06 16:15:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:13,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:13,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:13,739 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) [2024-11-06 16:15:13,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 16:15:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:14,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-06 16:15:14,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 16:15:14,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:14,545 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297979218] [2024-11-06 16:15:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297979218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1172225490] [2024-11-06 16:15:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:14,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:14,549 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:14,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-06 16:15:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:15,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-06 16:15:15,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 16:15:15,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1172225490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:15,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:15,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2024-11-06 16:15:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60096414] [2024-11-06 16:15:15,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:15,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 16:15:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 16:15:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-06 16:15:15,504 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 16:15:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:15,764 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-06 16:15:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 16:15:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-06 16:15:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:15,765 INFO L225 Difference]: With dead ends: 31 [2024-11-06 16:15:15,766 INFO L226 Difference]: Without dead ends: 29 [2024-11-06 16:15:15,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-11-06 16:15:15,767 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:15,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 16:15:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-06 16:15:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-06 16:15:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 16:15:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-06 16:15:15,774 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2024-11-06 16:15:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:15,775 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-06 16:15:15,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 16:15:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-06 16:15:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-06 16:15:15,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:15,776 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-11-06 16:15:15,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:15,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-06 16:15:16,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:16,177 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:16,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash 666109311, now seen corresponding path program 2 times [2024-11-06 16:15:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:16,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586298200] [2024-11-06 16:15:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 16:15:16,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:16,182 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) [2024-11-06 16:15:16,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-06 16:15:16,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 16:15:16,579 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:16,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-06 16:15:16,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-06 16:15:17,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:17,162 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586298200] [2024-11-06 16:15:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586298200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555973063] [2024-11-06 16:15:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 16:15:17,163 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:17,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:17,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:17,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-06 16:15:17,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 16:15:17,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:17,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-06 16:15:17,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-06 16:15:18,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:18,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555973063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:18,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-06 16:15:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362373059] [2024-11-06 16:15:18,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:18,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 16:15:18,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 16:15:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-06 16:15:18,375 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-06 16:15:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:18,741 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-11-06 16:15:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-06 16:15:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-06 16:15:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:18,742 INFO L225 Difference]: With dead ends: 38 [2024-11-06 16:15:18,742 INFO L226 Difference]: Without dead ends: 36 [2024-11-06 16:15:18,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-06 16:15:18,744 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:18,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-06 16:15:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-06 16:15:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-06 16:15:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-06 16:15:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-06 16:15:18,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 47 [2024-11-06 16:15:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:18,758 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-06 16:15:18,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-06 16:15:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-06 16:15:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-06 16:15:18,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:18,760 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2024-11-06 16:15:18,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-06 16:15:18,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-06 16:15:19,160 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,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:19,161 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:19,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1667038243, now seen corresponding path program 3 times [2024-11-06 16:15:19,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:19,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357148103] [2024-11-06 16:15:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-06 16:15:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:19,166 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) [2024-11-06 16:15:19,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-06 16:15:19,777 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-06 16:15:19,778 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:19,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-06 16:15:19,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-06 16:15:20,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:20,443 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357148103] [2024-11-06 16:15:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357148103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293836587] [2024-11-06 16:15:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-06 16:15:20,444 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:20,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:20,446 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:20,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-06 16:15:21,297 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-06 16:15:21,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:21,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-06 16:15:21,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-06 16:15:21,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:21,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293836587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:21,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:21,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2024-11-06 16:15:21,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049158352] [2024-11-06 16:15:21,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:21,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 16:15:21,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 16:15:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-06 16:15:21,794 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 16:15:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:22,202 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-11-06 16:15:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 16:15:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 62 [2024-11-06 16:15:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:22,204 INFO L225 Difference]: With dead ends: 45 [2024-11-06 16:15:22,204 INFO L226 Difference]: Without dead ends: 43 [2024-11-06 16:15:22,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-06 16:15:22,205 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:22,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-06 16:15:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-06 16:15:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-11-06 16:15:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-06 16:15:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-11-06 16:15:22,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 62 [2024-11-06 16:15:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:22,213 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-11-06 16:15:22,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 16:15:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-11-06 16:15:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-06 16:15:22,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:22,215 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2024-11-06 16:15:22,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-06 16:15:22,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:22,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:22,617 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:22,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash 257648895, now seen corresponding path program 4 times [2024-11-06 16:15:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262349760] [2024-11-06 16:15:22,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-06 16:15:22,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:22,620 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) [2024-11-06 16:15:22,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-06 16:15:23,140 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-06 16:15:23,140 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:23,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-06 16:15:23,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-06 16:15:23,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:23,853 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262349760] [2024-11-06 16:15:23,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262349760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [367125121] [2024-11-06 16:15:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-06 16:15:23,853 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:23,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:23,855 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:23,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-06 16:15:24,841 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-06 16:15:24,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:24,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-06 16:15:24,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-06 16:15:25,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:25,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [367125121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:25,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:25,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2024-11-06 16:15:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015100733] [2024-11-06 16:15:25,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:25,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 16:15:25,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 16:15:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-06 16:15:25,388 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-06 16:15:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:26,085 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-11-06 16:15:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 16:15:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2024-11-06 16:15:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:26,087 INFO L225 Difference]: With dead ends: 52 [2024-11-06 16:15:26,087 INFO L226 Difference]: Without dead ends: 50 [2024-11-06 16:15:26,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-06 16:15:26,088 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:26,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-06 16:15:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-06 16:15:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-06 16:15:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-06 16:15:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-11-06 16:15:26,098 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 77 [2024-11-06 16:15:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:26,098 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-11-06 16:15:26,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-06 16:15:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-11-06 16:15:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-06 16:15:26,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:26,100 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2024-11-06 16:15:26,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:26,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:26,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:26,501 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:26,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:26,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1970132829, now seen corresponding path program 5 times [2024-11-06 16:15:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771559909] [2024-11-06 16:15:26,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-06 16:15:26,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:26,506 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) [2024-11-06 16:15:26,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-06 16:15:28,225 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-06 16:15:28,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:28,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-06 16:15:28,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-06 16:15:28,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:29,017 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:29,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771559909] [2024-11-06 16:15:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771559909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:29,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [434320265] [2024-11-06 16:15:29,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-06 16:15:29,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:29,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:29,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-06 16:15:33,020 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-06 16:15:33,020 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:33,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-06 16:15:33,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-06 16:15:33,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:33,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [434320265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:33,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:33,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2024-11-06 16:15:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691540701] [2024-11-06 16:15:33,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:33,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 16:15:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 16:15:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-06 16:15:33,682 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-06 16:15:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:34,264 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-11-06 16:15:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-06 16:15:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 92 [2024-11-06 16:15:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:34,265 INFO L225 Difference]: With dead ends: 59 [2024-11-06 16:15:34,266 INFO L226 Difference]: Without dead ends: 57 [2024-11-06 16:15:34,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-06 16:15:34,267 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:34,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 169 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-06 16:15:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-06 16:15:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-06 16:15:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-06 16:15:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-06 16:15:34,277 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 92 [2024-11-06 16:15:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:34,278 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-06 16:15:34,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-06 16:15:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-06 16:15:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-06 16:15:34,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:34,280 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2024-11-06 16:15:34,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-06 16:15:34,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:34,680 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,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:34,681 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:34,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash -761811841, now seen corresponding path program 6 times [2024-11-06 16:15:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:34,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079724755] [2024-11-06 16:15:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-06 16:15:34,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:34,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:34,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:34,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-06 16:15:36,494 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-06 16:15:36,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:36,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-11-06 16:15:36,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 66 proven. 195 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-06 16:15:49,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:57,969 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079724755] [2024-11-06 16:15:57,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079724755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1468045812] [2024-11-06 16:15:57,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-06 16:15:57,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:57,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:57,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-06 16:15:57,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-06 16:16:00,000 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-06 16:16:00,001 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:16:00,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-11-06 16:16:00,062 INFO L278 TraceCheckSpWp]: Computing forward predicates...