/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/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:26:16,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:26:16,341 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 19:26:16,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:26:16,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:26:16,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:26:16,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:26:16,358 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:26:16,358 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:26:16,359 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:26:16,359 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:26:16,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:26:16,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:26:16,360 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:26:16,360 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:26:16,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:26:16,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:26:16,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:26:16,361 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:26:16,361 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:26:16,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:26:16,362 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:26:16,362 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:26:16,362 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:26:16,363 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:26:16,363 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:26:16,363 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:26:16,363 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:26:16,364 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:26:16,364 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:26:16,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:26:16,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:26:16,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:26:16,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:26:16,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:26:16,365 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:26:16,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:26:16,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:26:16,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:26:16,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:26:16,366 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:26:16,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:26:16,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:26:16,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:26:16,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:26:16,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:26:16,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:26:16,512 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:26:16,513 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:26:16,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor4.i [2023-12-18 19:26:17,504 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:26:17,743 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:26:17,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor4.i [2023-12-18 19:26:17,750 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743bc590a/7e748f1240ad49e99957fb5e197fd298/FLAGa87e03eb9 [2023-12-18 19:26:17,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743bc590a/7e748f1240ad49e99957fb5e197fd298 [2023-12-18 19:26:17,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:26:17,768 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:26:17,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:26:17,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:26:17,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:26:17,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:17,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602d1874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17, skipping insertion in model container [2023-12-18 19:26:17,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:17,791 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:26:17,923 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/xor4.i[1303,1316] [2023-12-18 19:26:17,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:26:17,935 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:26:17,948 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/xor4.i[1303,1316] [2023-12-18 19:26:17,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:26:17,958 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:26:17,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17 WrapperNode [2023-12-18 19:26:17,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:26:17,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:26:17,959 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:26:17,959 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:26:17,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:17,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:17,981 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-12-18 19:26:17,981 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:26:17,982 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:26:17,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:26:17,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:26:17,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:17,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:17,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,018 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2023-12-18 19:26:18,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,029 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:26:18,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:26:18,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:26:18,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:26:18,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (1/1) ... [2023-12-18 19:26:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:26:18,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:18,048 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 19:26:18,065 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 19:26:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:26:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:26:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:26:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 19:26:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:26:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:26:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:26:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 19:26:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:26:18,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:26:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:26:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:26:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 19:26:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-12-18 19:26:18,074 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-12-18 19:26:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:26:18,142 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:26:18,143 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:26:18,252 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:26:18,274 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:26:18,274 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 19:26:18,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:26:18 BoogieIcfgContainer [2023-12-18 19:26:18,274 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:26:18,275 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:26:18,276 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:26:18,278 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:26:18,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:26:17" (1/3) ... [2023-12-18 19:26:18,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5f90c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:26:18, skipping insertion in model container [2023-12-18 19:26:18,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:17" (2/3) ... [2023-12-18 19:26:18,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5f90c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:26:18, skipping insertion in model container [2023-12-18 19:26:18,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:26:18" (3/3) ... [2023-12-18 19:26:18,282 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2023-12-18 19:26:18,294 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:26:18,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:26:18,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:26:18,328 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;@2de2496c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:26:18,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:26:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 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 19:26:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 19:26:18,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:18,341 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 19:26:18,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:18,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1380801659, now seen corresponding path program 1 times [2023-12-18 19:26:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111623464] [2023-12-18 19:26:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-18 19:26:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:18,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 19:26:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:26:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:18,595 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 19:26:18,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111623464] [2023-12-18 19:26:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111623464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016143739] [2023-12-18 19:26:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:18,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:18,599 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 19:26:18,604 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 19:26:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:18,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-18 19:26:18,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:26:18,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:26:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016143739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:18,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:26:18,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-12-18 19:26:18,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861545607] [2023-12-18 19:26:18,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 19:26:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 19:26:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 19:26:18,709 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 19:26:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:18,729 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2023-12-18 19:26:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:26:18,730 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 25 [2023-12-18 19:26:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:18,735 INFO L225 Difference]: With dead ends: 46 [2023-12-18 19:26:18,735 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 19:26:18,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 19:26:18,739 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:18,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 19:26:18,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-18 19:26:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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 19:26:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-12-18 19:26:18,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 25 [2023-12-18 19:26:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:18,767 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-12-18 19:26:18,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 19:26:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-12-18 19:26:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 19:26:18,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:18,770 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 19:26:18,774 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 19:26:18,974 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 19:26:18,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:18,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1735084607, now seen corresponding path program 1 times [2023-12-18 19:26:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900141166] [2023-12-18 19:26:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-18 19:26:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 19:26:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:26:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,113 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 19:26:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900141166] [2023-12-18 19:26:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900141166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832744682] [2023-12-18 19:26:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:19,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:19,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:19,120 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 19:26:19,136 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 19:26:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:26:19,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:19,210 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 19:26:19,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:26:19,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832744682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:19,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:26:19,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-18 19:26:19,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619898651] [2023-12-18 19:26:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:19,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:26:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:26:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:26:19,212 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. 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 19:26:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:19,224 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-12-18 19:26:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:26:19,224 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 19:26:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:19,225 INFO L225 Difference]: With dead ends: 43 [2023-12-18 19:26:19,225 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 19:26:19,225 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 19:26:19,226 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:19,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 19:26:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-18 19:26:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 19:26:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-12-18 19:26:19,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2023-12-18 19:26:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:19,230 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-12-18 19:26:19,230 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 19:26:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-12-18 19:26:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:26:19,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:19,231 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 19:26:19,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:19,436 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 19:26:19,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2127840843, now seen corresponding path program 1 times [2023-12-18 19:26:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651321212] [2023-12-18 19:26:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:26:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 19:26:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:26:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,557 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 19:26:19,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651321212] [2023-12-18 19:26:19,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651321212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429791147] [2023-12-18 19:26:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:19,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:19,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:19,570 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 19:26:19,588 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 19:26:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:26:19,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:19,639 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 19:26:19,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:26:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429791147] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:19,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:26:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-18 19:26:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342443950] [2023-12-18 19:26:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:26:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:26:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:26:19,641 INFO L87 Difference]: Start difference. First operand 23 states and 30 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 19:26:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:19,658 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2023-12-18 19:26:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:26:19,659 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 19:26:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:19,660 INFO L225 Difference]: With dead ends: 46 [2023-12-18 19:26:19,660 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 19:26:19,660 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 19:26:19,661 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 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 19:26:19,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 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 19:26:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 19:26:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-12-18 19:26:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 19:26:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-12-18 19:26:19,664 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2023-12-18 19:26:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:19,665 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-12-18 19:26:19,665 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 19:26:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-12-18 19:26:19,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 19:26:19,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:19,665 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 19:26:19,672 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 19:26:19,866 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 19:26:19,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:19,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2015595361, now seen corresponding path program 1 times [2023-12-18 19:26:19,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36881584] [2023-12-18 19:26:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:26:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:26:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-18 19:26:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:19,997 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 19:26:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36881584] [2023-12-18 19:26:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36881584] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449142700] [2023-12-18 19:26:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:20,009 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 19:26:20,026 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 19:26:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:26:20,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:20,109 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 19:26:20,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:26:20,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449142700] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:20,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:26:20,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-18 19:26:20,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563810486] [2023-12-18 19:26:20,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:26:20,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:26:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:26:20,111 INFO L87 Difference]: Start difference. First operand 24 states and 31 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 19:26:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:20,126 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-12-18 19:26:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:26:20,127 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 19:26:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:20,128 INFO L225 Difference]: With dead ends: 40 [2023-12-18 19:26:20,128 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 19:26:20,129 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 19:26:20,132 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 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 19:26:20,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 19:26:20,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-18 19:26:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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 19:26:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-18 19:26:20,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 35 [2023-12-18 19:26:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:20,136 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-18 19:26:20,136 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 19:26:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-18 19:26:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 19:26:20,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:20,137 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 19:26:20,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-18 19:26:20,344 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 19:26:20,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:20,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2101539649, now seen corresponding path program 1 times [2023-12-18 19:26:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:20,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340571554] [2023-12-18 19:26:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:26:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:26:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 19:26:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,427 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 19:26:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340571554] [2023-12-18 19:26:20,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340571554] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582081150] [2023-12-18 19:26:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:20,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:20,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:20,429 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 19:26:20,456 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 19:26:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 19:26:20,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:20,518 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 19:26:20,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:20,544 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 19:26:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582081150] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:20,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:20,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-18 19:26:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158313644] [2023-12-18 19:26:20,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 19:26:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 19:26:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:26:20,546 INFO L87 Difference]: Start difference. First operand 25 states and 32 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 19:26:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:20,592 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2023-12-18 19:26:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 19:26:20,592 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 19:26:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:20,593 INFO L225 Difference]: With dead ends: 59 [2023-12-18 19:26:20,594 INFO L226 Difference]: Without dead ends: 37 [2023-12-18 19:26:20,594 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 19:26:20,595 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 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 19:26:20,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-18 19:26:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-12-18 19:26:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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 19:26:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-12-18 19:26:20,598 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 36 [2023-12-18 19:26:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:20,598 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-12-18 19:26:20,598 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 19:26:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-12-18 19:26:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 19:26:20,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:20,599 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 19:26:20,606 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 19:26:20,804 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 19:26:20,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:20,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash -90819289, now seen corresponding path program 2 times [2023-12-18 19:26:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:20,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604293938] [2023-12-18 19:26:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:20,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 19:26:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 19:26:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-18 19:26:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:20,863 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 19:26:20,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604293938] [2023-12-18 19:26:20,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604293938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920259329] [2023-12-18 19:26:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:26:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:20,865 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 19:26:20,895 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 19:26:20,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:26:20,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:20,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 19:26:20,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:21,043 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 19:26:21,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:21,098 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 19:26:21,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920259329] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:21,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:21,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-18 19:26:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586482711] [2023-12-18 19:26:21,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:26:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:26:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:26:21,101 INFO L87 Difference]: Start difference. First operand 33 states and 43 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 19:26:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:21,141 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2023-12-18 19:26:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 19:26:21,141 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 19:26:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:21,143 INFO L225 Difference]: With dead ends: 67 [2023-12-18 19:26:21,143 INFO L226 Difference]: Without dead ends: 40 [2023-12-18 19:26:21,143 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 19:26:21,144 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 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 19:26:21,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-18 19:26:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-18 19:26:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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 19:26:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-12-18 19:26:21,161 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 48 [2023-12-18 19:26:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:21,161 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-12-18 19:26:21,161 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 19:26:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-12-18 19:26:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 19:26:21,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:21,165 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 19:26:21,186 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 19:26:21,387 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 19:26:21,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:21,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1606414655, now seen corresponding path program 3 times [2023-12-18 19:26:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:21,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335078718] [2023-12-18 19:26:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:21,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:21,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:26:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:21,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 19:26:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:21,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-18 19:26:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:21,488 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 19:26:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335078718] [2023-12-18 19:26:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335078718] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364333930] [2023-12-18 19:26:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:26:21,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:21,489 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 19:26:21,517 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 19:26:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 19:26:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:21,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:26:21,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:21,595 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 19:26:21,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:21,627 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 19:26:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364333930] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:21,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:21,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-18 19:26:21,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709260197] [2023-12-18 19:26:21,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:21,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 19:26:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 19:26:21,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-18 19:26:21,629 INFO L87 Difference]: Start difference. First operand 40 states and 50 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 19:26:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:21,669 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2023-12-18 19:26:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 19:26:21,669 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 19:26:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:21,670 INFO L225 Difference]: With dead ends: 79 [2023-12-18 19:26:21,670 INFO L226 Difference]: Without dead ends: 53 [2023-12-18 19:26:21,670 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 19:26:21,670 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:21,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-18 19:26:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-12-18 19:26:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 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 19:26:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-12-18 19:26:21,675 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 55 [2023-12-18 19:26:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:21,675 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-12-18 19:26:21,675 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 19:26:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-12-18 19:26:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 19:26:21,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:21,676 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 19:26:21,694 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 19:26:21,881 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 19:26:21,881 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:21,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2129982999, now seen corresponding path program 4 times [2023-12-18 19:26:21,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:21,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127570242] [2023-12-18 19:26:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:21,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:26:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:26:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-18 19:26:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,109 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 19:26:22,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:22,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127570242] [2023-12-18 19:26:22,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127570242] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:22,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577135695] [2023-12-18 19:26:22,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:26:22,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:22,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:22,111 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 19:26:22,136 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 19:26:22,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:26:22,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:22,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 19:26:22,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:22,259 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 19:26:22,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:22,324 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 19:26:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577135695] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:22,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:22,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-12-18 19:26:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877624911] [2023-12-18 19:26:22,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:22,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 19:26:22,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 19:26:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-12-18 19:26:22,328 INFO L87 Difference]: Start difference. First operand 49 states and 62 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 19:26:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:22,374 INFO L93 Difference]: Finished difference Result 112 states and 161 transitions. [2023-12-18 19:26:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 19:26:22,375 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 19:26:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:22,376 INFO L225 Difference]: With dead ends: 112 [2023-12-18 19:26:22,376 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 19:26:22,377 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 19:26:22,378 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:22,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 19:26:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-18 19:26:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 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 19:26:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2023-12-18 19:26:22,395 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 68 [2023-12-18 19:26:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2023-12-18 19:26:22,396 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 19:26:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2023-12-18 19:26:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-18 19:26:22,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:22,400 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 19:26:22,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:22,606 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 19:26:22,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:22,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:22,606 INFO L85 PathProgramCache]: Analyzing trace with hash 943250635, now seen corresponding path program 5 times [2023-12-18 19:26:22,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:22,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813098857] [2023-12-18 19:26:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:22,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-18 19:26:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-18 19:26:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-12-18 19:26:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:22,860 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 19:26:22,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813098857] [2023-12-18 19:26:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813098857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332336201] [2023-12-18 19:26:22,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:26:22,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:22,862 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 19:26:22,896 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 19:26:23,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-18 19:26:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:23,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:26:23,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:23,452 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 19:26:23,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:23,629 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 19:26:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332336201] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:23,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:23,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-12-18 19:26:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606042658] [2023-12-18 19:26:23,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:23,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 19:26:23,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 19:26:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-12-18 19:26:23,631 INFO L87 Difference]: Start difference. First operand 75 states and 103 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 19:26:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:23,698 INFO L93 Difference]: Finished difference Result 188 states and 287 transitions. [2023-12-18 19:26:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 19:26:23,699 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 19:26:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:23,700 INFO L225 Difference]: With dead ends: 188 [2023-12-18 19:26:23,700 INFO L226 Difference]: Without dead ends: 126 [2023-12-18 19:26:23,700 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 19:26:23,701 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 234 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:23,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 227 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-18 19:26:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-18 19:26:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.4710743801652892) internal successors, (178), 121 states have internal predecessors, (178), 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 19:26:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2023-12-18 19:26:23,706 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 114 [2023-12-18 19:26:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:23,706 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2023-12-18 19:26:23,706 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 19:26:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2023-12-18 19:26:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-18 19:26:23,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:23,707 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 19:26:23,726 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 19:26:23,914 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 19:26:23,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:23,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1178683777, now seen corresponding path program 6 times [2023-12-18 19:26:23,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:23,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887548308] [2023-12-18 19:26:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:23,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:24,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:26:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:24,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-18 19:26:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:24,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-12-18 19:26:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:24,258 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 19:26:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887548308] [2023-12-18 19:26:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887548308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359054147] [2023-12-18 19:26:24,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:26:24,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:24,259 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 19:26:24,287 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 19:26:24,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-18 19:26:24,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:24,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:26:24,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:24,701 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 19:26:24,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:24,823 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 19:26:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359054147] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:24,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-12-18 19:26:24,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408643768] [2023-12-18 19:26:24,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:24,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:26:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:26:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:26:24,830 INFO L87 Difference]: Start difference. First operand 126 states and 184 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 19:26:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:24,881 INFO L93 Difference]: Finished difference Result 247 states and 371 transitions. [2023-12-18 19:26:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 19:26:24,881 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 19:26:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:24,883 INFO L225 Difference]: With dead ends: 247 [2023-12-18 19:26:24,883 INFO L226 Difference]: Without dead ends: 135 [2023-12-18 19:26:24,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:26:24,884 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 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 19:26:24,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-18 19:26:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-12-18 19:26:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.4384615384615385) internal successors, (187), 130 states have internal predecessors, (187), 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 19:26:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 193 transitions. [2023-12-18 19:26:24,895 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 193 transitions. Word has length 205 [2023-12-18 19:26:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:24,896 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 193 transitions. [2023-12-18 19:26:24,896 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 19:26:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 193 transitions. [2023-12-18 19:26:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-12-18 19:26:24,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:24,899 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 19:26:24,925 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 19:26:25,105 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 19:26:25,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:25,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash -456273397, now seen corresponding path program 7 times [2023-12-18 19:26:25,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809464839] [2023-12-18 19:26:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:25,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:26:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:25,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-18 19:26:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-12-18 19:26:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:25,513 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 19:26:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809464839] [2023-12-18 19:26:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809464839] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890868742] [2023-12-18 19:26:25,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:26:25,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:25,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:25,530 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 19:26:25,554 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 19:26:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:25,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 19:26:25,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:25,763 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 19:26:25,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:26,025 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 19:26:26,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890868742] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:26,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:26,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-12-18 19:26:26,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302920964] [2023-12-18 19:26:26,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:26,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 19:26:26,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 19:26:26,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 19:26:26,027 INFO L87 Difference]: Start difference. First operand 135 states and 193 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 19:26:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:26,065 INFO L93 Difference]: Finished difference Result 270 states and 400 transitions. [2023-12-18 19:26:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 19:26:26,066 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 19:26:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:26,066 INFO L225 Difference]: With dead ends: 270 [2023-12-18 19:26:26,066 INFO L226 Difference]: Without dead ends: 150 [2023-12-18 19:26:26,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 19:26:26,068 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 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 19:26:26,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-18 19:26:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-12-18 19:26:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.393103448275862) internal successors, (202), 145 states have internal predecessors, (202), 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 19:26:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2023-12-18 19:26:26,072 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 214 [2023-12-18 19:26:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:26,072 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2023-12-18 19:26:26,072 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 19:26:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2023-12-18 19:26:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-12-18 19:26:26,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:26,074 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 19:26:26,097 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 19:26:26,280 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 19:26:26,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:26,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash 424224385, now seen corresponding path program 8 times [2023-12-18 19:26:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670667308] [2023-12-18 19:26:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:27,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:26:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:27,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-18 19:26:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:27,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-12-18 19:26:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:27,153 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 19:26:27,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:27,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670667308] [2023-12-18 19:26:27,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670667308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:27,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405958861] [2023-12-18 19:26:27,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:26:27,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:27,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:27,154 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 19:26:27,193 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 19:26:27,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:26:27,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:27,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 19:26:27,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:27,441 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 19:26:27,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:28,239 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 19:26:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405958861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:28,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:28,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-12-18 19:26:28,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162987801] [2023-12-18 19:26:28,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-18 19:26:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-18 19:26:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 19:26:28,243 INFO L87 Difference]: Start difference. First operand 150 states and 208 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 19:26:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:28,299 INFO L93 Difference]: Finished difference Result 300 states and 445 transitions. [2023-12-18 19:26:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-18 19:26:28,299 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 19:26:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:28,300 INFO L225 Difference]: With dead ends: 300 [2023-12-18 19:26:28,300 INFO L226 Difference]: Without dead ends: 180 [2023-12-18 19:26:28,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 19:26:28,302 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:28,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-18 19:26:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-12-18 19:26:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 175 states have internal predecessors, (232), 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 19:26:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 238 transitions. [2023-12-18 19:26:28,307 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 238 transitions. Word has length 229 [2023-12-18 19:26:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:28,307 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 238 transitions. [2023-12-18 19:26:28,308 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 19:26:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 238 transitions. [2023-12-18 19:26:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-12-18 19:26:28,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:28,309 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 19:26:28,326 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 19:26:28,516 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 19:26:28,516 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:28,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1169439041, now seen corresponding path program 9 times [2023-12-18 19:26:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894969664] [2023-12-18 19:26:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:30,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-18 19:26:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:30,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-12-18 19:26:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:30,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-12-18 19:26:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:30,637 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 19:26:30,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894969664] [2023-12-18 19:26:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894969664] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009385493] [2023-12-18 19:26:30,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:26:30,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:30,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:30,654 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 19:26:30,678 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 19:26:32,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 19:26:32,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:32,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:26:32,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-12-18 19:26:32,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:33,257 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 19:26:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009385493] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:33,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-12-18 19:26:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043747289] [2023-12-18 19:26:33,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:33,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-18 19:26:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-18 19:26:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-12-18 19:26:33,261 INFO L87 Difference]: Start difference. First operand 180 states and 238 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 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 19:26:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:33,379 INFO L93 Difference]: Finished difference Result 317 states and 449 transitions. [2023-12-18 19:26:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-18 19:26:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 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 259 [2023-12-18 19:26:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:33,380 INFO L225 Difference]: With dead ends: 317 [2023-12-18 19:26:33,380 INFO L226 Difference]: Without dead ends: 197 [2023-12-18 19:26:33,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-12-18 19:26:33,383 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:33,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:26:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-18 19:26:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-12-18 19:26:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.296875) internal successors, (249), 192 states have internal predecessors, (249), 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 19:26:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 255 transitions. [2023-12-18 19:26:33,396 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 255 transitions. Word has length 259 [2023-12-18 19:26:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:33,396 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 255 transitions. [2023-12-18 19:26:33,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 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 19:26:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 255 transitions. [2023-12-18 19:26:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-18 19:26:33,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:33,398 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 19:26:33,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 19:26:33,605 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 19:26:33,606 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:33,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash 833871691, now seen corresponding path program 10 times [2023-12-18 19:26:33,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:33,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120782118] [2023-12-18 19:26:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:33,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:35,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-18 19:26:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:35,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-12-18 19:26:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:35,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-12-18 19:26:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:35,761 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 19:26:35,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:35,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120782118] [2023-12-18 19:26:35,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120782118] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:35,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572438596] [2023-12-18 19:26:35,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:26:35,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:35,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:35,778 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 19:26:35,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 19:26:36,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:26:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:36,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:26:36,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:36,665 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 19:26:36,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:37,462 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 19:26:37,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572438596] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:37,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:37,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-12-18 19:26:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108746565] [2023-12-18 19:26:37,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-18 19:26:37,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-18 19:26:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-18 19:26:37,467 INFO L87 Difference]: Start difference. First operand 197 states and 255 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 19:26:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:37,675 INFO L93 Difference]: Finished difference Result 434 states and 633 transitions. [2023-12-18 19:26:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-18 19:26:37,675 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 19:26:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:37,678 INFO L225 Difference]: With dead ends: 434 [2023-12-18 19:26:37,678 INFO L226 Difference]: Without dead ends: 298 [2023-12-18 19:26:37,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-18 19:26:37,681 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 559 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:37,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 425 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:26:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-18 19:26:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2023-12-18 19:26:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.3993174061433447) internal successors, (410), 293 states have internal predecessors, (410), 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 19:26:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 416 transitions. [2023-12-18 19:26:37,688 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 416 transitions. Word has length 276 [2023-12-18 19:26:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:37,688 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 416 transitions. [2023-12-18 19:26:37,689 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 19:26:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 416 transitions. [2023-12-18 19:26:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-12-18 19:26:37,692 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:37,692 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 19:26:37,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:37,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:37,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:37,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2055562111, now seen corresponding path program 11 times [2023-12-18 19:26:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235291560] [2023-12-18 19:26:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:40,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-18 19:26:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:40,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-12-18 19:26:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:40,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-12-18 19:26:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:40,396 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 19:26:40,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:40,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235291560] [2023-12-18 19:26:40,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235291560] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:40,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852807053] [2023-12-18 19:26:40,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:26:40,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:40,397 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:26:40,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 19:40:59,006 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 19:40:59,030 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 19:41:00,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-18 19:41:00,206 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2023-12-18 19:41:00,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 19:41:00,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:41:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2023-12-18 19:41:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369762133] [2023-12-18 19:41:00,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 19:41:00,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-18 19:41:00,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:41:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-18 19:41:00,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 19:41:00,239 INFO L87 Difference]: Start difference. First operand 298 states and 416 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 19:41:00,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2023-12-18 19:41:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:41:00,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 19:41:00,252 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 19:41:00,252 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 19:41:00,253 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 19:41:00,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-18 19:41:00,254 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (298states) 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 19:41:00,274 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1, 1] [2023-12-18 19:41:00,277 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 19:41:00,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:41:00 BoogieIcfgContainer [2023-12-18 19:41:00,280 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 19:41:00,280 INFO L158 Benchmark]: Toolchain (without parser) took 882512.21ms. Allocated memory was 200.3MB in the beginning and 576.7MB in the end (delta: 376.4MB). Free memory was 167.9MB in the beginning and 515.1MB in the end (delta: -347.2MB). Peak memory consumption was 30.8MB. Max. memory is 8.0GB. [2023-12-18 19:41:00,280 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 158.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:41:00,281 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.47ms. Allocated memory is still 200.3MB. Free memory was 167.8MB in the beginning and 156.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 19:41:00,281 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.21ms. Allocated memory is still 200.3MB. Free memory was 156.3MB in the beginning and 154.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:41:00,281 INFO L158 Benchmark]: Boogie Preprocessor took 46.67ms. Allocated memory is still 200.3MB. Free memory was 154.8MB in the beginning and 152.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:41:00,281 INFO L158 Benchmark]: RCFGBuilder took 245.14ms. Allocated memory is still 200.3MB. Free memory was 152.7MB in the beginning and 138.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-18 19:41:00,283 INFO L158 Benchmark]: TraceAbstraction took 882004.18ms. Allocated memory was 200.3MB in the beginning and 576.7MB in the end (delta: 376.4MB). Free memory was 137.4MB in the beginning and 515.1MB in the end (delta: -377.6MB). Peak memory consumption was 386.4kB. Max. memory is 8.0GB. [2023-12-18 19:41:00,286 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 158.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.47ms. Allocated memory is still 200.3MB. Free memory was 167.8MB in the beginning and 156.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.21ms. Allocated memory is still 200.3MB. Free memory was 156.3MB in the beginning and 154.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 46.67ms. Allocated memory is still 200.3MB. Free memory was 154.8MB in the beginning and 152.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 245.14ms. Allocated memory is still 200.3MB. Free memory was 152.7MB in the beginning and 138.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 882004.18ms. Allocated memory was 200.3MB in the beginning and 576.7MB in the end (delta: 376.4MB). Free memory was 137.4MB in the beginning and 515.1MB in the end (delta: -377.6MB). Peak memory consumption was 386.4kB. 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 (298states) 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, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 882.0s, OverallIterations: 15, TraceHistogramMax: 114, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 908 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 908 mSDsluCounter, 1972 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1641 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 869 IncrementalHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 331 mSDtfsCounter, 869 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3481 GetRequests, 3028 SyntacticMatches, 0 SemanticMatches, 453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4628 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=14, 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, 14 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 3687 NumberOfCodeBlocks, 3351 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 5152 ConstructedInterpolants, 0 QuantifiedInterpolants, 6392 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6385 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 39 InterpolantComputations, 4 PerfectInterpolantSequences, 99099/108103 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