/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/bor1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 17:11:02,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 17:11:02,122 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 17:11:02,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 17:11:02,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 17:11:02,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 17:11:02,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 17:11:02,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 17:11:02,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 17:11:02,151 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 17:11:02,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 17:11:02,152 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 17:11:02,152 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 17:11:02,153 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 17:11:02,153 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 17:11:02,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 17:11:02,154 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 17:11:02,154 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 17:11:02,154 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 17:11:02,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 17:11:02,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 17:11:02,155 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 17:11:02,155 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 17:11:02,155 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 17:11:02,155 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 17:11:02,155 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 17:11:02,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 17:11:02,156 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 17:11:02,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 17:11:02,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 17:11:02,157 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 17:11:02,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 17:11:02,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:11:02,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 17:11:02,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 17:11:02,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 17:11:02,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 17:11:02,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 17:11:02,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 17:11:02,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 17:11:02,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 17:11:02,371 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 17:11:02,371 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 17:11:02,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor1.i [2023-12-15 17:11:03,349 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 17:11:03,515 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 17:11:03,516 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor1.i [2023-12-15 17:11:03,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed3f0882/1902251d56624adc98741e9c1c163b22/FLAGbc6635165 [2023-12-15 17:11:03,532 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed3f0882/1902251d56624adc98741e9c1c163b22 [2023-12-15 17:11:03,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 17:11:03,535 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 17:11:03,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 17:11:03,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 17:11:03,540 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 17:11:03,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561d798f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03, skipping insertion in model container [2023-12-15 17:11:03,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,560 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 17:11:03,698 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/bor1.i[1285,1298] [2023-12-15 17:11:03,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:11:03,708 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 17:11:03,721 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/bor1.i[1285,1298] [2023-12-15 17:11:03,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:11:03,732 INFO L206 MainTranslator]: Completed translation [2023-12-15 17:11:03,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03 WrapperNode [2023-12-15 17:11:03,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 17:11:03,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 17:11:03,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 17:11:03,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 17:11:03,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,761 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-12-15 17:11:03,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 17:11:03,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 17:11:03,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 17:11:03,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 17:11:03,770 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,781 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]. [2023-12-15 17:11:03,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,781 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,788 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 17:11:03,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 17:11:03,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 17:11:03,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 17:11:03,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (1/1) ... [2023-12-15 17:11:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:11:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:03,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 17:11:03,868 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 [2023-12-15 17:11:03,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 17:11:03,873 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2023-12-15 17:11:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2023-12-15 17:11:03,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 17:11:03,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 17:11:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 17:11:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 17:11:03,923 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 17:11:03,925 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 17:11:04,080 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 17:11:04,108 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 17:11:04,108 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 17:11:04,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:11:04 BoogieIcfgContainer [2023-12-15 17:11:04,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 17:11:04,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 17:11:04,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 17:11:04,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 17:11:04,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 05:11:03" (1/3) ... [2023-12-15 17:11:04,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1424f82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:11:04, skipping insertion in model container [2023-12-15 17:11:04,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:11:03" (2/3) ... [2023-12-15 17:11:04,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1424f82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:11:04, skipping insertion in model container [2023-12-15 17:11:04,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:11:04" (3/3) ... [2023-12-15 17:11:04,116 INFO L112 eAbstractionObserver]: Analyzing ICFG bor1.i [2023-12-15 17:11:04,131 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 17:11:04,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 17:11:04,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 17:11:04,179 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;@50ff8456, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 17:11:04,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 17:11:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 17:11:04,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:04,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:11:04,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:04,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1143770574, now seen corresponding path program 1 times [2023-12-15 17:11:04,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:04,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346410334] [2023-12-15 17:11:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:04,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 17:11:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 17:11:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:04,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-15 17:11:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:11:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346410334] [2023-12-15 17:11:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346410334] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428173401] [2023-12-15 17:11:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:04,545 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) [2023-12-15 17:11:04,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 17:11:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:04,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 17:11:04,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:11:04,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 17:11:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428173401] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:11:04,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:11:04,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-15 17:11:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527777477] [2023-12-15 17:11:04,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:11:04,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:11:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:04,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:11:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 17:11:04,748 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-15 17:11:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:04,780 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2023-12-15 17:11:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:11:04,782 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 [2023-12-15 17:11:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:04,787 INFO L225 Difference]: With dead ends: 45 [2023-12-15 17:11:04,788 INFO L226 Difference]: Without dead ends: 22 [2023-12-15 17:11:04,790 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 [2023-12-15 17:11:04,795 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:04,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-15 17:11:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-15 17:11:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-15 17:11:04,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 25 [2023-12-15 17:11:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:04,823 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-15 17:11:04,823 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) [2023-12-15 17:11:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-15 17:11:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 17:11:04,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:04,824 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] [2023-12-15 17:11:04,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 17:11:05,030 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 [2023-12-15 17:11:05,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:05,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1668871841, now seen corresponding path program 1 times [2023-12-15 17:11:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:05,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653108773] [2023-12-15 17:11:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-15 17:11:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 17:11:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:11:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:11:05,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:05,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653108773] [2023-12-15 17:11:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653108773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563178898] [2023-12-15 17:11:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:05,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:05,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:11:05,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 17:11:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 17:11:05,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-15 17:11:05,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 17:11:05,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563178898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:11:05,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:11:05,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-15 17:11:05,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800878350] [2023-12-15 17:11:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:11:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:11:05,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:11:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 17:11:05,312 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 17:11:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:05,329 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2023-12-15 17:11:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:11:05,329 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 [2023-12-15 17:11:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:05,330 INFO L225 Difference]: With dead ends: 43 [2023-12-15 17:11:05,330 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 17:11:05,331 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 [2023-12-15 17:11:05,333 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:05,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 17:11:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-15 17:11:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-12-15 17:11:05,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 26 [2023-12-15 17:11:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:05,344 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-12-15 17:11:05,344 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) [2023-12-15 17:11:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-12-15 17:11:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-15 17:11:05,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:05,344 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] [2023-12-15 17:11:05,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 17:11:05,551 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 [2023-12-15 17:11:05,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:05,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash 220189929, now seen corresponding path program 1 times [2023-12-15 17:11:05,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:05,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350794684] [2023-12-15 17:11:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:05,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-15 17:11:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 17:11:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-15 17:11:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 17:11:05,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350794684] [2023-12-15 17:11:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350794684] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559698843] [2023-12-15 17:11:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:05,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:05,678 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) [2023-12-15 17:11:05,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 17:11:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:05,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 17:11:05,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 17:11:05,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 17:11:05,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559698843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:11:05,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:11:05,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-15 17:11:05,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379776023] [2023-12-15 17:11:05,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:11:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:11:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:05,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:11:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:11:05,769 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 17:11:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:05,784 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-12-15 17:11:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:11:05,785 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 [2023-12-15 17:11:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:05,785 INFO L225 Difference]: With dead ends: 38 [2023-12-15 17:11:05,785 INFO L226 Difference]: Without dead ends: 24 [2023-12-15 17:11:05,786 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 [2023-12-15 17:11:05,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:05,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-15 17:11:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-15 17:11:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-15 17:11:05,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 35 [2023-12-15 17:11:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:05,800 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-15 17:11:05,800 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) [2023-12-15 17:11:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-15 17:11:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-15 17:11:05,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:05,802 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] [2023-12-15 17:11:05,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 17:11:06,024 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 [2023-12-15 17:11:06,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:06,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash -727189650, now seen corresponding path program 1 times [2023-12-15 17:11:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:06,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332348192] [2023-12-15 17:11:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:06,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-15 17:11:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 17:11:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-15 17:11:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-15 17:11:06,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332348192] [2023-12-15 17:11:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332348192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202761890] [2023-12-15 17:11:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:06,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:06,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:06,150 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) [2023-12-15 17:11:06,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 17:11:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 17:11:06,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-15 17:11:06,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-15 17:11:06,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202761890] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:06,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:06,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-15 17:11:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036843976] [2023-12-15 17:11:06,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 17:11:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 17:11:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-15 17:11:06,296 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-15 17:11:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:06,329 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-12-15 17:11:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 17:11:06,330 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 [2023-12-15 17:11:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:06,330 INFO L225 Difference]: With dead ends: 55 [2023-12-15 17:11:06,330 INFO L226 Difference]: Without dead ends: 34 [2023-12-15 17:11:06,331 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 [2023-12-15 17:11:06,331 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:06,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-15 17:11:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-12-15 17:11:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-15 17:11:06,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 36 [2023-12-15 17:11:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:06,345 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-15 17:11:06,345 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) [2023-12-15 17:11:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-15 17:11:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-15 17:11:06,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:06,346 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] [2023-12-15 17:11:06,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:06,552 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 [2023-12-15 17:11:06,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:06,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1910194571, now seen corresponding path program 2 times [2023-12-15 17:11:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476479434] [2023-12-15 17:11:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-15 17:11:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-15 17:11:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-15 17:11:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-15 17:11:06,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476479434] [2023-12-15 17:11:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476479434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097811810] [2023-12-15 17:11:06,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:11:06,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:06,645 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) [2023-12-15 17:11:06,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 17:11:06,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:11:06,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:06,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 17:11:06,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-15 17:11:06,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-15 17:11:06,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097811810] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:06,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:06,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-15 17:11:06,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109426292] [2023-12-15 17:11:06,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:06,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 17:11:06,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 17:11:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-15 17:11:06,843 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-15 17:11:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:06,877 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2023-12-15 17:11:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 17:11:06,877 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 [2023-12-15 17:11:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:06,878 INFO L225 Difference]: With dead ends: 63 [2023-12-15 17:11:06,878 INFO L226 Difference]: Without dead ends: 38 [2023-12-15 17:11:06,878 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 [2023-12-15 17:11:06,879 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:06,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-15 17:11:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-15 17:11:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-12-15 17:11:06,883 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2023-12-15 17:11:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:06,883 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-12-15 17:11:06,883 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) [2023-12-15 17:11:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-12-15 17:11:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-15 17:11:06,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:06,884 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] [2023-12-15 17:11:06,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:07,089 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 [2023-12-15 17:11:07,090 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:07,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1702488334, now seen corresponding path program 3 times [2023-12-15 17:11:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:07,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640793862] [2023-12-15 17:11:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 17:11:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-15 17:11:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-15 17:11:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-15 17:11:07,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:07,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640793862] [2023-12-15 17:11:07,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640793862] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:07,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248542569] [2023-12-15 17:11:07,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:11:07,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:07,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:07,205 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) [2023-12-15 17:11:07,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 17:11:07,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 17:11:07,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:07,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:11:07,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-15 17:11:07,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-12-15 17:11:07,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248542569] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:07,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:07,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-15 17:11:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698449202] [2023-12-15 17:11:07,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 17:11:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 17:11:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-15 17:11:07,350 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 17:11:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:07,384 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-12-15 17:11:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:11:07,385 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 [2023-12-15 17:11:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:07,385 INFO L225 Difference]: With dead ends: 73 [2023-12-15 17:11:07,385 INFO L226 Difference]: Without dead ends: 49 [2023-12-15 17:11:07,386 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 [2023-12-15 17:11:07,386 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:07,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-15 17:11:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-12-15 17:11:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-12-15 17:11:07,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 55 [2023-12-15 17:11:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:07,390 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-12-15 17:11:07,390 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) [2023-12-15 17:11:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-12-15 17:11:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-15 17:11:07,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:07,391 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] [2023-12-15 17:11:07,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-15 17:11:07,596 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 [2023-12-15 17:11:07,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:07,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash 247386870, now seen corresponding path program 4 times [2023-12-15 17:11:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:07,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150847935] [2023-12-15 17:11:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 17:11:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-15 17:11:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-15 17:11:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-12-15 17:11:07,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150847935] [2023-12-15 17:11:07,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150847935] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383394214] [2023-12-15 17:11:07,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:11:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:07,820 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) [2023-12-15 17:11:07,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 17:11:07,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:11:07,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:07,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 17:11:07,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-15 17:11:08,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-15 17:11:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383394214] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:08,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:08,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-12-15 17:11:08,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624502990] [2023-12-15 17:11:08,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:08,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-15 17:11:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-15 17:11:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-12-15 17:11:08,089 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 17:11:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:08,141 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-12-15 17:11:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-15 17:11:08,141 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 [2023-12-15 17:11:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:08,142 INFO L225 Difference]: With dead ends: 101 [2023-12-15 17:11:08,142 INFO L226 Difference]: Without dead ends: 67 [2023-12-15 17:11:08,142 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 [2023-12-15 17:11:08,143 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:08,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-15 17:11:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-15 17:11:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-12-15 17:11:08,148 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 68 [2023-12-15 17:11:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:08,148 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-12-15 17:11:08,148 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) [2023-12-15 17:11:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-12-15 17:11:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-15 17:11:08,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:08,149 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] [2023-12-15 17:11:08,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:08,355 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 [2023-12-15 17:11:08,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:08,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:08,355 INFO L85 PathProgramCache]: Analyzing trace with hash 782687711, now seen corresponding path program 5 times [2023-12-15 17:11:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:08,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962143289] [2023-12-15 17:11:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:08,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:08,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-15 17:11:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:08,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-15 17:11:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:08,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-12-15 17:11:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-12-15 17:11:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962143289] [2023-12-15 17:11:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962143289] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41039722] [2023-12-15 17:11:08,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:11:08,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:08,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:08,642 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) [2023-12-15 17:11:08,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 17:11:09,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-15 17:11:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:09,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:11:09,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-12-15 17:11:09,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-12-15 17:11:09,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41039722] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:09,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:09,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-12-15 17:11:09,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866145018] [2023-12-15 17:11:09,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:09,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-15 17:11:09,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-15 17:11:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-12-15 17:11:09,532 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 17:11:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:09,612 INFO L93 Difference]: Finished difference Result 162 states and 235 transitions. [2023-12-15 17:11:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-15 17:11:09,613 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 [2023-12-15 17:11:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:09,613 INFO L225 Difference]: With dead ends: 162 [2023-12-15 17:11:09,614 INFO L226 Difference]: Without dead ends: 108 [2023-12-15 17:11:09,614 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 [2023-12-15 17:11:09,615 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:09,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 251 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:11:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-15 17:11:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-12-15 17:11:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2023-12-15 17:11:09,621 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 114 [2023-12-15 17:11:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:09,621 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2023-12-15 17:11:09,621 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) [2023-12-15 17:11:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2023-12-15 17:11:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-15 17:11:09,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:09,623 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] [2023-12-15 17:11:09,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:09,830 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 [2023-12-15 17:11:09,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:09,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2082430674, now seen corresponding path program 6 times [2023-12-15 17:11:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:09,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950511827] [2023-12-15 17:11:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:09,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:10,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 17:11:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:10,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-15 17:11:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:10,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-12-15 17:11:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-12-15 17:11:10,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:10,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950511827] [2023-12-15 17:11:10,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950511827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:10,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702083579] [2023-12-15 17:11:10,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:11:10,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:10,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:10,169 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) [2023-12-15 17:11:10,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 17:11:10,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-15 17:11:10,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:10,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:11:10,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-12-15 17:11:10,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-12-15 17:11:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702083579] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:10,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:10,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-12-15 17:11:10,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023841288] [2023-12-15 17:11:10,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:10,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 17:11:10,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:10,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 17:11:10,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:11:10,649 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 17:11:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:10,687 INFO L93 Difference]: Finished difference Result 211 states and 299 transitions. [2023-12-15 17:11:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-15 17:11:10,688 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 [2023-12-15 17:11:10,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:10,688 INFO L225 Difference]: With dead ends: 211 [2023-12-15 17:11:10,688 INFO L226 Difference]: Without dead ends: 117 [2023-12-15 17:11:10,689 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 [2023-12-15 17:11:10,689 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:10,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-15 17:11:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-15 17:11:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 112 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-12-15 17:11:10,695 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 205 [2023-12-15 17:11:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:10,695 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-12-15 17:11:10,695 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) [2023-12-15 17:11:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-12-15 17:11:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-12-15 17:11:10,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:10,697 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] [2023-12-15 17:11:10,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:10,902 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 [2023-12-15 17:11:10,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:10,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1810196225, now seen corresponding path program 7 times [2023-12-15 17:11:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:10,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881730914] [2023-12-15 17:11:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:11,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-15 17:11:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:11,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-15 17:11:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-12-15 17:11:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:11,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881730914] [2023-12-15 17:11:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881730914] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069434965] [2023-12-15 17:11:11,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:11:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:11,333 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) [2023-12-15 17:11:11,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 17:11:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:11,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-15 17:11:11,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:11,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:11,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069434965] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:11,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:11,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-12-15 17:11:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260886200] [2023-12-15 17:11:11,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:11,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 17:11:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 17:11:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-15 17:11:11,801 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-15 17:11:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:11,835 INFO L93 Difference]: Finished difference Result 234 states and 328 transitions. [2023-12-15 17:11:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 17:11:11,836 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 [2023-12-15 17:11:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:11,836 INFO L225 Difference]: With dead ends: 234 [2023-12-15 17:11:11,836 INFO L226 Difference]: Without dead ends: 132 [2023-12-15 17:11:11,837 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 [2023-12-15 17:11:11,837 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:11,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-15 17:11:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-15 17:11:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 127 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-12-15 17:11:11,843 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 214 [2023-12-15 17:11:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-12-15 17:11:11,844 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) [2023-12-15 17:11:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-12-15 17:11:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-12-15 17:11:11,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:11,845 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] [2023-12-15 17:11:11,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:12,051 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 [2023-12-15 17:11:12,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:12,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1342335058, now seen corresponding path program 8 times [2023-12-15 17:11:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:12,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763936129] [2023-12-15 17:11:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:12,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-15 17:11:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:12,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-15 17:11:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-12-15 17:11:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:12,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:12,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763936129] [2023-12-15 17:11:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763936129] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:12,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545547432] [2023-12-15 17:11:12,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:11:12,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:12,888 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) [2023-12-15 17:11:12,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 17:11:13,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:11:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:13,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-15 17:11:13,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:13,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545547432] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:13,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-12-15 17:11:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190372648] [2023-12-15 17:11:13,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:13,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-15 17:11:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-15 17:11:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-15 17:11:14,001 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-15 17:11:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:14,058 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-12-15 17:11:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-15 17:11:14,058 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 [2023-12-15 17:11:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:14,059 INFO L225 Difference]: With dead ends: 264 [2023-12-15 17:11:14,059 INFO L226 Difference]: Without dead ends: 162 [2023-12-15 17:11:14,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-15 17:11:14,062 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:14,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:11:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-15 17:11:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-12-15 17:11:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-12-15 17:11:14,078 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 229 [2023-12-15 17:11:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:14,079 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-12-15 17:11:14,079 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) [2023-12-15 17:11:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-12-15 17:11:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-12-15 17:11:14,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:14,080 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] [2023-12-15 17:11:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:14,286 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 [2023-12-15 17:11:14,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:14,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1392892750, now seen corresponding path program 9 times [2023-12-15 17:11:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:14,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752225983] [2023-12-15 17:11:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-15 17:11:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:16,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-12-15 17:11:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-12-15 17:11:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-15 17:11:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752225983] [2023-12-15 17:11:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752225983] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275236570] [2023-12-15 17:11:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:11:16,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:16,570 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) [2023-12-15 17:11:16,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 17:11:19,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-15 17:11:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:19,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 17:11:19,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-12-15 17:11:19,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-12-15 17:11:20,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275236570] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:20,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:20,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-12-15 17:11:20,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880274204] [2023-12-15 17:11:20,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-15 17:11:20,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-15 17:11:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-12-15 17:11:20,078 INFO L87 Difference]: Start difference. First operand 162 states and 202 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) [2023-12-15 17:11:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:20,169 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2023-12-15 17:11:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-15 17:11:20,170 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 [2023-12-15 17:11:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:20,171 INFO L225 Difference]: With dead ends: 281 [2023-12-15 17:11:20,171 INFO L226 Difference]: Without dead ends: 179 [2023-12-15 17:11:20,173 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 [2023-12-15 17:11:20,174 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:20,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:11:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-15 17:11:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-12-15 17:11:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2241379310344827) internal successors, (213), 174 states have internal predecessors, (213), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2023-12-15 17:11:20,179 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 259 [2023-12-15 17:11:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:20,179 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2023-12-15 17:11:20,180 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) [2023-12-15 17:11:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2023-12-15 17:11:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-15 17:11:20,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:20,182 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] [2023-12-15 17:11:20,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:20,390 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 [2023-12-15 17:11:20,390 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:20,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash 384793247, now seen corresponding path program 10 times [2023-12-15 17:11:20,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:20,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428662841] [2023-12-15 17:11:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:20,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:22,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-15 17:11:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-12-15 17:11:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:22,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-12-15 17:11:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-12-15 17:11:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428662841] [2023-12-15 17:11:22,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428662841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872364083] [2023-12-15 17:11:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:11:22,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:22,726 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) [2023-12-15 17:11:22,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 17:11:23,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:11:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:11:23,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 17:11:23,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:11:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-12-15 17:11:23,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:11:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-12-15 17:11:24,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872364083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:11:24,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:11:24,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-12-15 17:11:24,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068382021] [2023-12-15 17:11:24,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:11:24,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-15 17:11:24,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:11:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-15 17:11:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-15 17:11:24,202 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 17:11:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:11:24,398 INFO L93 Difference]: Finished difference Result 378 states and 521 transitions. [2023-12-15 17:11:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-15 17:11:24,399 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 [2023-12-15 17:11:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:11:24,401 INFO L225 Difference]: With dead ends: 378 [2023-12-15 17:11:24,401 INFO L226 Difference]: Without dead ends: 260 [2023-12-15 17:11:24,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-15 17:11:24,405 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 442 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:11:24,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 256 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:11:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-15 17:11:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-12-15 17:11:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.3098039215686275) internal successors, (334), 255 states have internal predecessors, (334), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 17:11:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 340 transitions. [2023-12-15 17:11:24,415 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 340 transitions. Word has length 276 [2023-12-15 17:11:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:11:24,415 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 340 transitions. [2023-12-15 17:11:24,416 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) [2023-12-15 17:11:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 340 transitions. [2023-12-15 17:11:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-12-15 17:11:24,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:11:24,426 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] [2023-12-15 17:11:24,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 17:11:24,632 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 [2023-12-15 17:11:24,633 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:11:24,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:11:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 43549266, now seen corresponding path program 11 times [2023-12-15 17:11:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:11:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859528469] [2023-12-15 17:11:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:11:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:11:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-15 17:11:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-12-15 17:11:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:27,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-12-15 17:11:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:11:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-12-15 17:11:27,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:11:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859528469] [2023-12-15 17:11:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859528469] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:11:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781686015] [2023-12-15 17:11:27,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:11:27,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:11:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:11:27,440 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) [2023-12-15 17:11:27,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 17:12:15,460 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:12:15,473 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 [2023-12-15 17:12:16,481 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 [2023-12-15 17:12:16,661 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process [2023-12-15 17:12:16,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 137 [2023-12-15 17:12:16,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 17:12:16,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:12:16,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2023-12-15 17:12:16,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453740567] [2023-12-15 17:12:16,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-15 17:12:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-15 17:12:16,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-15 17:12:16,674 INFO L87 Difference]: Start difference. First operand 260 states and 340 transitions. Second operand has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 63 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-15 17:12:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:12:16,677 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 [2023-12-15 17:12:16,678 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 [2023-12-15 17:12:16,678 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] [2023-12-15 17:12:16,680 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:12:16,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-15 17:12:16,681 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (260states) and FLOYD_HOARE automaton (currently 2 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-15 17:12:16,684 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2023-12-15 17:12:16,687 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:12:16,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:12:16 BoogieIcfgContainer [2023-12-15 17:12:16,690 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:12:16,690 INFO L158 Benchmark]: Toolchain (without parser) took 73155.15ms. Allocated memory was 235.9MB in the beginning and 588.3MB in the end (delta: 352.3MB). Free memory was 184.0MB in the beginning and 470.4MB in the end (delta: -286.4MB). Peak memory consumption was 67.5MB. Max. memory is 8.0GB. [2023-12-15 17:12:16,690 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 196.1MB. Free memory is still 144.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:12:16,690 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.36ms. Allocated memory is still 235.9MB. Free memory was 183.4MB in the beginning and 172.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 17:12:16,690 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.03ms. Allocated memory is still 235.9MB. Free memory was 172.4MB in the beginning and 170.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:12:16,691 INFO L158 Benchmark]: Boogie Preprocessor took 27.59ms. Allocated memory is still 235.9MB. Free memory was 170.9MB in the beginning and 168.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:12:16,691 INFO L158 Benchmark]: RCFGBuilder took 318.54ms. Allocated memory is still 235.9MB. Free memory was 168.8MB in the beginning and 154.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-15 17:12:16,691 INFO L158 Benchmark]: TraceAbstraction took 72578.81ms. Allocated memory was 235.9MB in the beginning and 588.3MB in the end (delta: 352.3MB). Free memory was 153.6MB in the beginning and 470.4MB in the end (delta: -316.8MB). Peak memory consumption was 37.0MB. Max. memory is 8.0GB. [2023-12-15 17:12:16,692 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 196.1MB. Free memory is still 144.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.36ms. Allocated memory is still 235.9MB. Free memory was 183.4MB in the beginning and 172.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.03ms. Allocated memory is still 235.9MB. Free memory was 172.4MB in the beginning and 170.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.59ms. Allocated memory is still 235.9MB. Free memory was 170.9MB in the beginning and 168.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 318.54ms. Allocated memory is still 235.9MB. Free memory was 168.8MB in the beginning and 154.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 72578.81ms. Allocated memory was 235.9MB in the beginning and 588.3MB in the end (delta: 352.3MB). Free memory was 153.6MB in the beginning and 470.4MB in the end (delta: -316.8MB). Peak memory consumption was 37.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 53). Cancelled while NwaCegarLoop was constructing difference of abstraction (260states) and FLOYD_HOARE automaton (currently 2 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 72.5s, OverallIterations: 14, TraceHistogramMax: 114, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 627 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 627 mSDsluCounter, 1604 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1323 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 838 IncrementalHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 281 mSDtfsCounter, 838 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3448 GetRequests, 2997 SyntacticMatches, 0 SemanticMatches, 451 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4628 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=260occurred in iteration=13, InterpolantAutomatonStates: 405, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 3637 NumberOfCodeBlocks, 3301 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 5104 ConstructedInterpolants, 0 QuantifiedInterpolants, 6340 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6014 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 37 InterpolantComputations, 3 PerfectInterpolantSequences, 99081/108079 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown