/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/bAnd3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:04:43,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:04:43,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 19:04:43,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:04:43,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:04:43,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:04:43,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:04:43,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:04:43,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:04:43,865 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:04:43,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:04:43,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:04:43,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:04:43,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:04:43,868 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:04:43,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:04:43,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:04:43,869 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:04:43,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:04:43,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:04:43,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:04:43,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:04:43,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:04:43,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:04:43,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:04:43,871 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:04:43,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:04:43,871 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:04:43,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:04:43,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:04:43,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:04:43,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:04:43,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:04:43,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:04:43,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:04:43,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:04:43,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:04:43,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:04:43,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:04:43,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:04:43,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:04:43,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:04:43,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:04:43,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:04:44,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:04:44,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:04:44,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:04:44,126 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:04:44,126 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:04:44,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd3.i [2023-12-18 19:04:45,218 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:04:45,388 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:04:45,389 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd3.i [2023-12-18 19:04:45,396 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5dc9d0a9/d2791ff2a0ca4e9e80a907f0cbc7871a/FLAG484b11da4 [2023-12-18 19:04:45,407 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5dc9d0a9/d2791ff2a0ca4e9e80a907f0cbc7871a [2023-12-18 19:04:45,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:04:45,410 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:04:45,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:04:45,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:04:45,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:04:45,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee10534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45, skipping insertion in model container [2023-12-18 19:04:45,416 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,433 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:04:45,581 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd3.i[1302,1315] [2023-12-18 19:04:45,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:04:45,599 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:04:45,624 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd3.i[1302,1315] [2023-12-18 19:04:45,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:04:45,644 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:04:45,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45 WrapperNode [2023-12-18 19:04:45,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:04:45,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:04:45,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:04:45,647 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:04:45,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,667 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,690 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-12-18 19:04:45,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:04:45,691 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:04:45,691 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:04:45,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:04:45,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,705 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,729 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 11, 8]. 52 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 5 writes are split as follows [0, 5, 0]. [2023-12-18 19:04:45,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:04:45,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:04:45,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:04:45,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:04:45,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (1/1) ... [2023-12-18 19:04:45,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:04:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:45,782 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) [2023-12-18 19:04:45,808 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 [2023-12-18 19:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 19:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:04:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:04:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:04:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 19:04:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-12-18 19:04:45,816 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-12-18 19:04:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:04:45,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:04:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:04:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:04:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 19:04:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:04:45,878 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:04:45,880 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:04:46,025 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:04:46,063 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:04:46,063 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 19:04:46,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:04:46 BoogieIcfgContainer [2023-12-18 19:04:46,064 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:04:46,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:04:46,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:04:46,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:04:46,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:04:45" (1/3) ... [2023-12-18 19:04:46,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658524e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:04:46, skipping insertion in model container [2023-12-18 19:04:46,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:04:45" (2/3) ... [2023-12-18 19:04:46,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658524e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:04:46, skipping insertion in model container [2023-12-18 19:04:46,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:04:46" (3/3) ... [2023-12-18 19:04:46,075 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd3.i [2023-12-18 19:04:46,088 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:04:46,088 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:04:46,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:04:46,124 INFO L357 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, mHoare=true, 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;@675db43a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:04:46,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:04:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 19:04:46,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:46,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:46,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:46,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1143770574, now seen corresponding path program 1 times [2023-12-18 19:04:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:46,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605708975] [2023-12-18 19:04:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:46,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:46,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-18 19:04:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:46,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 19:04:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:46,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:04:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:04:46,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605708975] [2023-12-18 19:04:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605708975] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848066646] [2023-12-18 19:04:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:46,524 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) [2023-12-18 19:04:46,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 19:04:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:46,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:04:46,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:04:46,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:04:46,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848066646] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:04:46,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:04:46,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-18 19:04:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854659398] [2023-12-18 19:04:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:04:46,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:04:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:04:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:04:46,683 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:04:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:46,715 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2023-12-18 19:04:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:04:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-18 19:04:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:46,722 INFO L225 Difference]: With dead ends: 45 [2023-12-18 19:04:46,722 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 19:04:46,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:04:46,728 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:46,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 19:04:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-18 19:04:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-18 19:04:46,759 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 25 [2023-12-18 19:04:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:46,760 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-18 19:04:46,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:04:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-18 19:04:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:04:46,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:46,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:46,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 19:04:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-18 19:04:46,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:46,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1668871841, now seen corresponding path program 1 times [2023-12-18 19:04:46,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:46,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243675795] [2023-12-18 19:04:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:46,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:04:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 19:04:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:04:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:04:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243675795] [2023-12-18 19:04:47,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243675795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:47,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496864624] [2023-12-18 19:04:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:47,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:47,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:47,094 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) [2023-12-18 19:04:47,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 19:04:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:04:47,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:04:47,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:04:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496864624] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:04:47,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:04:47,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-18 19:04:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064002584] [2023-12-18 19:04:47,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:04:47,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:04:47,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:04:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:04:47,210 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:04:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:47,239 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2023-12-18 19:04:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:04:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-18 19:04:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:47,242 INFO L225 Difference]: With dead ends: 43 [2023-12-18 19:04:47,242 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 19:04:47,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:04:47,245 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:47,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 19:04:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-18 19:04:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-12-18 19:04:47,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 26 [2023-12-18 19:04:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:47,259 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-12-18 19:04:47,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:04:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-12-18 19:04:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 19:04:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:47,261 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:47,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 19:04:47,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-18 19:04:47,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:47,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash 220189929, now seen corresponding path program 1 times [2023-12-18 19:04:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177532513] [2023-12-18 19:04:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:04:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:04:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-18 19:04:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 19:04:47,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177532513] [2023-12-18 19:04:47,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177532513] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042069244] [2023-12-18 19:04:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:47,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:47,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:47,622 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) [2023-12-18 19:04:47,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 19:04:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:47,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:04:47,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 19:04:47,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:04:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042069244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:04:47,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:04:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-18 19:04:47,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523858284] [2023-12-18 19:04:47,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:04:47,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:04:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:04:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:04:47,734 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:04:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:47,757 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-12-18 19:04:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:04:47,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-18 19:04:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:47,758 INFO L225 Difference]: With dead ends: 38 [2023-12-18 19:04:47,758 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 19:04:47,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:04:47,762 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:47,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 19:04:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-18 19:04:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-18 19:04:47,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 35 [2023-12-18 19:04:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:47,774 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-18 19:04:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:04:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-18 19:04:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 19:04:47,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:47,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:47,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:47,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:47,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:47,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash -727189650, now seen corresponding path program 1 times [2023-12-18 19:04:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636623844] [2023-12-18 19:04:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:47,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:04:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:04:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 19:04:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:04:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636623844] [2023-12-18 19:04:48,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636623844] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125275146] [2023-12-18 19:04:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:48,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:48,112 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) [2023-12-18 19:04:48,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 19:04:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 19:04:48,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:04:48,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:04:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125275146] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:48,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:48,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-18 19:04:48,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970458913] [2023-12-18 19:04:48,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:48,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 19:04:48,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 19:04:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:04:48,260 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:04:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:48,312 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-12-18 19:04:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 19:04:48,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-12-18 19:04:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:48,313 INFO L225 Difference]: With dead ends: 55 [2023-12-18 19:04:48,313 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 19:04:48,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:04:48,314 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:48,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 19:04:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-12-18 19:04:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-18 19:04:48,320 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 36 [2023-12-18 19:04:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:48,320 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-18 19:04:48,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:04:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-18 19:04:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 19:04:48,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:48,322 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:48,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:48,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:48,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:48,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1910194571, now seen corresponding path program 2 times [2023-12-18 19:04:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857906] [2023-12-18 19:04:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:48,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 19:04:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 19:04:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-18 19:04:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-18 19:04:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857906] [2023-12-18 19:04:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99149919] [2023-12-18 19:04:48,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:04:48,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:48,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:48,674 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) [2023-12-18 19:04:48,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 19:04:48,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:04:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:04:48,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 19:04:48,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-18 19:04:48,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-18 19:04:48,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99149919] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:48,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:48,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-18 19:04:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095571588] [2023-12-18 19:04:48,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:48,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:04:48,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:48,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:04:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:04:48,895 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 19:04:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:48,938 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2023-12-18 19:04:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 19:04:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-12-18 19:04:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:48,940 INFO L225 Difference]: With dead ends: 63 [2023-12-18 19:04:48,940 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 19:04:48,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:04:48,942 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:48,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 19:04:48,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-18 19:04:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-12-18 19:04:48,956 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2023-12-18 19:04:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:48,956 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-12-18 19:04:48,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 19:04:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-12-18 19:04:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 19:04:48,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:48,963 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:48,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:49,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:49,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:49,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1702488334, now seen corresponding path program 3 times [2023-12-18 19:04:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:49,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350003317] [2023-12-18 19:04:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:49,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:04:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:49,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 19:04:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-18 19:04:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:04:49,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:49,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350003317] [2023-12-18 19:04:49,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350003317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:49,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367511150] [2023-12-18 19:04:49,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:04:49,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:49,320 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) [2023-12-18 19:04:49,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 19:04:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 19:04:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:04:49,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:04:49,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:04:49,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-12-18 19:04:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367511150] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:49,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-18 19:04:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657417241] [2023-12-18 19:04:49,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 19:04:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 19:04:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-18 19:04:49,492 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:49,544 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-12-18 19:04:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 19:04:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-12-18 19:04:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:49,548 INFO L225 Difference]: With dead ends: 73 [2023-12-18 19:04:49,548 INFO L226 Difference]: Without dead ends: 49 [2023-12-18 19:04:49,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-18 19:04:49,551 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:49,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-18 19:04:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-12-18 19:04:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-12-18 19:04:49,557 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 55 [2023-12-18 19:04:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:49,558 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-12-18 19:04:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-12-18 19:04:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 19:04:49,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:49,559 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:49,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:49,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:49,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:49,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 247386870, now seen corresponding path program 4 times [2023-12-18 19:04:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044131878] [2023-12-18 19:04:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:04:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:04:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-18 19:04:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-12-18 19:04:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044131878] [2023-12-18 19:04:50,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044131878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104836265] [2023-12-18 19:04:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:04:50,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:50,044 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) [2023-12-18 19:04:50,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 19:04:50,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:04:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:04:50,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 19:04:50,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-18 19:04:50,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-18 19:04:50,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104836265] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:50,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:50,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-12-18 19:04:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556716795] [2023-12-18 19:04:50,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 19:04:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 19:04:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-12-18 19:04:50,321 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:50,382 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-12-18 19:04:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 19:04:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-12-18 19:04:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:50,383 INFO L225 Difference]: With dead ends: 101 [2023-12-18 19:04:50,383 INFO L226 Difference]: Without dead ends: 67 [2023-12-18 19:04:50,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-12-18 19:04:50,388 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:50,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-18 19:04:50,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-18 19:04:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-12-18 19:04:50,403 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 68 [2023-12-18 19:04:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:50,404 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-12-18 19:04:50,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-12-18 19:04:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-18 19:04:50,407 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:50,407 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:50,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:50,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:50,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:50,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:50,614 INFO L85 PathProgramCache]: Analyzing trace with hash 782687711, now seen corresponding path program 5 times [2023-12-18 19:04:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:50,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985895142] [2023-12-18 19:04:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:50,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-18 19:04:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-18 19:04:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-12-18 19:04:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-12-18 19:04:50,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985895142] [2023-12-18 19:04:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985895142] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801735777] [2023-12-18 19:04:50,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:04:50,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:50,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:50,921 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) [2023-12-18 19:04:50,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 19:04:51,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-18 19:04:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:04:51,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:04:51,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-12-18 19:04:51,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-12-18 19:04:51,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801735777] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:51,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:51,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-12-18 19:04:51,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134057585] [2023-12-18 19:04:51,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:51,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 19:04:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 19:04:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-12-18 19:04:51,928 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:52,019 INFO L93 Difference]: Finished difference Result 162 states and 235 transitions. [2023-12-18 19:04:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 19:04:52,024 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-12-18 19:04:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:52,026 INFO L225 Difference]: With dead ends: 162 [2023-12-18 19:04:52,026 INFO L226 Difference]: Without dead ends: 108 [2023-12-18 19:04:52,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-12-18 19:04:52,029 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:52,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 251 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:04:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-18 19:04:52,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-12-18 19:04:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2023-12-18 19:04:52,049 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 114 [2023-12-18 19:04:52,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:52,051 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2023-12-18 19:04:52,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2023-12-18 19:04:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-18 19:04:52,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:52,056 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:52,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-18 19:04:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-18 19:04:52,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:52,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2082430674, now seen corresponding path program 6 times [2023-12-18 19:04:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:52,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129797610] [2023-12-18 19:04:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:52,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:04:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:52,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-18 19:04:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-12-18 19:04:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-12-18 19:04:52,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129797610] [2023-12-18 19:04:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129797610] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272244044] [2023-12-18 19:04:52,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:04:52,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:52,749 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) [2023-12-18 19:04:52,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 19:04:53,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-18 19:04:53,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:04:53,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:04:53,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-12-18 19:04:53,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-12-18 19:04:53,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272244044] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:53,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:53,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-12-18 19:04:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300362313] [2023-12-18 19:04:53,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:53,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:04:53,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:04:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:04:53,383 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:53,426 INFO L93 Difference]: Finished difference Result 211 states and 299 transitions. [2023-12-18 19:04:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 19:04:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2023-12-18 19:04:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:53,427 INFO L225 Difference]: With dead ends: 211 [2023-12-18 19:04:53,428 INFO L226 Difference]: Without dead ends: 117 [2023-12-18 19:04:53,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:04:53,429 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:53,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-18 19:04:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-18 19:04:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 112 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-12-18 19:04:53,435 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 205 [2023-12-18 19:04:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:53,436 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-12-18 19:04:53,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:04:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-12-18 19:04:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-12-18 19:04:53,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:53,438 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:53,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:53,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:53,644 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:53,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1810196225, now seen corresponding path program 7 times [2023-12-18 19:04:53,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:53,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431557355] [2023-12-18 19:04:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:53,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:54,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:04:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-18 19:04:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:54,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-12-18 19:04:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:04:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431557355] [2023-12-18 19:04:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431557355] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11745783] [2023-12-18 19:04:54,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:04:54,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:54,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:54,136 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) [2023-12-18 19:04:54,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 19:04:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:54,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 19:04:54,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:04:54,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:04:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11745783] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:54,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-12-18 19:04:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363247123] [2023-12-18 19:04:54,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:54,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 19:04:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 19:04:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 19:04:54,689 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:04:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:54,736 INFO L93 Difference]: Finished difference Result 234 states and 328 transitions. [2023-12-18 19:04:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 19:04:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2023-12-18 19:04:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:54,738 INFO L225 Difference]: With dead ends: 234 [2023-12-18 19:04:54,738 INFO L226 Difference]: Without dead ends: 132 [2023-12-18 19:04:54,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 19:04:54,739 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:54,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-18 19:04:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-18 19:04:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 127 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-12-18 19:04:54,746 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 214 [2023-12-18 19:04:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:54,746 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-12-18 19:04:54,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:04:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-12-18 19:04:54,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-12-18 19:04:54,748 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:54,748 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:54,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:54,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 19:04:54,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:54,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1342335058, now seen corresponding path program 8 times [2023-12-18 19:04:54,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:54,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513377292] [2023-12-18 19:04:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:04:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:56,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-18 19:04:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-12-18 19:04:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:04:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:04:56,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:04:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513377292] [2023-12-18 19:04:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513377292] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:04:56,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036832601] [2023-12-18 19:04:56,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:04:56,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:04:56,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:04:56,096 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) [2023-12-18 19:04:56,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 19:04:56,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:04:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:04:56,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 19:04:56,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:04:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:04:56,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:04:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:04:57,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036832601] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:04:57,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:04:57,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-12-18 19:04:57,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130687430] [2023-12-18 19:04:57,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:04:57,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-18 19:04:57,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:04:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-18 19:04:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 19:04:57,541 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:04:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:04:57,612 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-12-18 19:04:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-18 19:04:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2023-12-18 19:04:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:04:57,614 INFO L225 Difference]: With dead ends: 264 [2023-12-18 19:04:57,614 INFO L226 Difference]: Without dead ends: 162 [2023-12-18 19:04:57,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 19:04:57,616 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:04:57,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:04:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-18 19:04:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-12-18 19:04:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:04:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-12-18 19:04:57,623 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 229 [2023-12-18 19:04:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:04:57,623 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-12-18 19:04:57,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:04:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-12-18 19:04:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-12-18 19:04:57,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:04:57,626 INFO L195 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:04:57,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 19:04:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 19:04:57,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:04:57,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:04:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1392892750, now seen corresponding path program 9 times [2023-12-18 19:04:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:04:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197372347] [2023-12-18 19:04:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:04:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:04:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:00,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-18 19:05:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:00,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-12-18 19:05:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:00,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-12-18 19:05:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:05:00,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:05:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197372347] [2023-12-18 19:05:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197372347] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:05:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617632032] [2023-12-18 19:05:00,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:05:00,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:05:00,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:05:00,661 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) [2023-12-18 19:05:00,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 19:05:02,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 19:05:02,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:05:02,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 19:05:02,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:05:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2082 proven. 105 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2023-12-18 19:05:02,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:05:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-12-18 19:05:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617632032] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:05:03,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:05:03,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 19, 17] total 93 [2023-12-18 19:05:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906232277] [2023-12-18 19:05:03,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:05:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-12-18 19:05:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:05:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-12-18 19:05:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2345, Invalid=6211, Unknown=0, NotChecked=0, Total=8556 [2023-12-18 19:05:03,578 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 93 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 93 states have internal predecessors, (124), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-18 19:05:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:05:06,221 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2023-12-18 19:05:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-18 19:05:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 93 states have internal predecessors, (124), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 259 [2023-12-18 19:05:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:05:06,223 INFO L225 Difference]: With dead ends: 281 [2023-12-18 19:05:06,223 INFO L226 Difference]: Without dead ends: 179 [2023-12-18 19:05:06,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5714 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6557, Invalid=21165, Unknown=0, NotChecked=0, Total=27722 [2023-12-18 19:05:06,230 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:05:06,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 178 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:05:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-18 19:05:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-12-18 19:05:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2241379310344827) internal successors, (213), 174 states have internal predecessors, (213), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:05:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2023-12-18 19:05:06,239 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 259 [2023-12-18 19:05:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:05:06,239 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2023-12-18 19:05:06,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 93 states have internal predecessors, (124), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-18 19:05:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2023-12-18 19:05:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-18 19:05:06,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:05:06,242 INFO L195 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:05:06,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 19:05:06,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 19:05:06,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:05:06,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:05:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 384793247, now seen corresponding path program 10 times [2023-12-18 19:05:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:05:06,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438203164] [2023-12-18 19:05:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:05:06,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:05:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:09,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-18 19:05:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:09,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-12-18 19:05:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:09,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-12-18 19:05:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-12-18 19:05:09,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:05:09,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438203164] [2023-12-18 19:05:09,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438203164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:05:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894894740] [2023-12-18 19:05:09,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:05:09,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:05:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:05:09,242 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) [2023-12-18 19:05:09,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 19:05:09,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:05:09,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:05:09,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:05:09,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:05:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-12-18 19:05:10,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:05:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-12-18 19:05:11,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894894740] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:05:11,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:05:11,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-12-18 19:05:11,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429187201] [2023-12-18 19:05:11,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:05:11,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-18 19:05:11,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:05:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-18 19:05:11,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-18 19:05:11,169 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:05:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:05:11,394 INFO L93 Difference]: Finished difference Result 378 states and 521 transitions. [2023-12-18 19:05:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-18 19:05:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2023-12-18 19:05:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:05:11,397 INFO L225 Difference]: With dead ends: 378 [2023-12-18 19:05:11,397 INFO L226 Difference]: Without dead ends: 260 [2023-12-18 19:05:11,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-18 19:05:11,400 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 304 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:05:11,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 354 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:05:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-18 19:05:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-12-18 19:05:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.3098039215686275) internal successors, (334), 255 states have internal predecessors, (334), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:05:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 340 transitions. [2023-12-18 19:05:11,410 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 340 transitions. Word has length 276 [2023-12-18 19:05:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:05:11,411 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 340 transitions. [2023-12-18 19:05:11,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:05:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 340 transitions. [2023-12-18 19:05:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-12-18 19:05:11,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:05:11,418 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:05:11,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 19:05:11,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 19:05:11,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:05:11,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:05:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash 43549266, now seen corresponding path program 11 times [2023-12-18 19:05:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:05:11,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332545672] [2023-12-18 19:05:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:05:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:05:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:14,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-18 19:05:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:14,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-12-18 19:05:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:14,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-12-18 19:05:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:05:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-12-18 19:05:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:05:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332545672] [2023-12-18 19:05:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332545672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:05:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780327397] [2023-12-18 19:05:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:05:14,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:05:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:05:14,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:05:14,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 19:19:17,735 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 19:19:17,735 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 19:19:18,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 [2023-12-18 19:19:18,940 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process [2023-12-18 19:19:18,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 137 [2023-12-18 19:19:18,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 19:19:18,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:19:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2023-12-18 19:19:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690616790] [2023-12-18 19:19:18,972 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 19:19:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-18 19:19:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:19:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-18 19:19:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 19:19:18,975 INFO L87 Difference]: Start difference. First operand 260 states and 340 transitions. Second operand has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 63 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:19:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:19:18,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 19:19:18,977 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:19:18,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:19:18,979 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 19:19:18,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-18 19:19:18,980 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (260states) and FLOYD_HOARE automaton (currently 2 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 19:19:18,984 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2023-12-18 19:19:18,986 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 19:19:18,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:19:18 BoogieIcfgContainer [2023-12-18 19:19:18,988 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 19:19:18,988 INFO L158 Benchmark]: Toolchain (without parser) took 873578.70ms. Allocated memory was 202.4MB in the beginning and 540.0MB in the end (delta: 337.6MB). Free memory was 158.9MB in the beginning and 347.5MB in the end (delta: -188.6MB). Peak memory consumption was 150.1MB. Max. memory is 8.0GB. [2023-12-18 19:19:18,989 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 202.4MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:19:18,989 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.96ms. Allocated memory is still 202.4MB. Free memory was 158.6MB in the beginning and 147.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-18 19:19:18,989 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.53ms. Allocated memory is still 202.4MB. Free memory was 147.4MB in the beginning and 145.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:19:18,989 INFO L158 Benchmark]: Boogie Preprocessor took 63.17ms. Allocated memory is still 202.4MB. Free memory was 145.7MB in the beginning and 143.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:19:18,989 INFO L158 Benchmark]: RCFGBuilder took 308.37ms. Allocated memory is still 202.4MB. Free memory was 143.6MB in the beginning and 129.2MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-18 19:19:18,990 INFO L158 Benchmark]: TraceAbstraction took 872922.25ms. Allocated memory was 202.4MB in the beginning and 540.0MB in the end (delta: 337.6MB). Free memory was 128.6MB in the beginning and 347.5MB in the end (delta: -219.0MB). Peak memory consumption was 119.7MB. Max. memory is 8.0GB. [2023-12-18 19:19:18,991 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 202.4MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 234.96ms. Allocated memory is still 202.4MB. Free memory was 158.6MB in the beginning and 147.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 44.53ms. Allocated memory is still 202.4MB. Free memory was 147.4MB in the beginning and 145.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 63.17ms. Allocated memory is still 202.4MB. Free memory was 145.7MB in the beginning and 143.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 308.37ms. Allocated memory is still 202.4MB. Free memory was 143.6MB in the beginning and 129.2MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 872922.25ms. Allocated memory was 202.4MB in the beginning and 540.0MB in the end (delta: 337.6MB). Free memory was 128.6MB in the beginning and 347.5MB in the end (delta: -219.0MB). Peak memory consumption was 119.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 53). Cancelled while NwaCegarLoop was constructing difference of abstraction (260states) and FLOYD_HOARE automaton (currently 2 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 872.9s, OverallIterations: 14, TraceHistogramMax: 114, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 513 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 512 mSDsluCounter, 1662 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1385 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 896 IncrementalHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 277 mSDtfsCounter, 896 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3522 GetRequests, 2995 SyntacticMatches, 0 SemanticMatches, 527 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8602 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=260occurred in iteration=13, InterpolantAutomatonStates: 407, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 3637 NumberOfCodeBlocks, 3301 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 5104 ConstructedInterpolants, 0 QuantifiedInterpolants, 6532 SizeOfPredicates, 1 NumberOfNonLiveVariables, 6038 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 37 InterpolantComputations, 3 PerfectInterpolantSequences, 99081/108079 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown