/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/hardness-nfm22/hardness_operatoramount_amount500_file-91.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:23:24,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:23:24,625 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 21:23:24,630 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:23:24,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:23:24,651 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:23:24,652 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:23:24,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:23:24,652 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:23:24,655 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:23:24,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:23:24,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:23:24,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:23:24,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:23:24,657 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:23:24,657 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:23:24,657 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:23:24,658 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:23:24,658 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:23:24,658 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:23:24,658 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:23:24,658 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:23:24,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:23:24,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:23:24,659 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:23:24,659 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:23:24,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:23:24,659 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:23:24,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:23:24,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:23:24,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:23:24,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:23:24,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:23:24,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:23:24,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:23:24,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:23:24,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:23:24,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:23:24,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:23:24,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:23:24,892 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:23:24,892 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:23:24,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-91.i [2023-12-15 21:23:25,985 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:23:26,159 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:23:26,159 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-91.i [2023-12-15 21:23:26,175 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1a89c7f/f1f3c0f301b34906a86300edcd1ed1fd/FLAG669bcacc4 [2023-12-15 21:23:26,184 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1a89c7f/f1f3c0f301b34906a86300edcd1ed1fd [2023-12-15 21:23:26,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:23:26,187 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:23:26,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:23:26,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:23:26,191 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:23:26,191 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16df5bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26, skipping insertion in model container [2023-12-15 21:23:26,192 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,246 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:23:26,349 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-91.i[916,929] [2023-12-15 21:23:26,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:23:26,547 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:23:26,555 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-91.i[916,929] [2023-12-15 21:23:26,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:23:26,690 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:23:26,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26 WrapperNode [2023-12-15 21:23:26,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:23:26,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:23:26,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:23:26,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:23:26,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,847 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 815 [2023-12-15 21:23:26,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:23:26,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:23:26,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:23:26,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:23:26,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,912 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 21:23:26,912 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,970 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:26,995 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:23:26,996 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:23:26,996 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:23:26,996 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:23:26,997 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (1/1) ... [2023-12-15 21:23:27,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:23:27,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:27,020 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 21:23:27,028 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 21:23:27,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:23:27,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 21:23:27,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 21:23:27,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:23:27,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:23:27,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:23:27,167 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:23:27,169 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:23:27,834 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:23:27,900 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:23:27,901 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 21:23:27,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:23:27 BoogieIcfgContainer [2023-12-15 21:23:27,901 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:23:27,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:23:27,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:23:27,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:23:27,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:23:26" (1/3) ... [2023-12-15 21:23:27,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569b7add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:23:27, skipping insertion in model container [2023-12-15 21:23:27,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:26" (2/3) ... [2023-12-15 21:23:27,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569b7add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:23:27, skipping insertion in model container [2023-12-15 21:23:27,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:23:27" (3/3) ... [2023-12-15 21:23:27,907 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-91.i [2023-12-15 21:23:27,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:23:27,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:23:27,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:23:27,974 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;@408e2ad0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:23:27,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:23:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 290 states, 221 states have (on average 1.6108597285067874) internal successors, (356), 222 states have internal predecessors, (356), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-15 21:23:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:28,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:28,003 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:28,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:28,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1353886927, now seen corresponding path program 1 times [2023-12-15 21:23:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119551011] [2023-12-15 21:23:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:28,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119551011] [2023-12-15 21:23:28,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 21:23:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512767244] [2023-12-15 21:23:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:28,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:28,348 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 21:23:28,378 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 21:23:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:28,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 21:23:28,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2023-12-15 21:23:28,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512767244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:28,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 21:23:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571239891] [2023-12-15 21:23:28,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:28,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 21:23:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:28,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 21:23:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:23:28,727 INFO L87 Difference]: Start difference. First operand has 290 states, 221 states have (on average 1.6108597285067874) internal successors, (356), 222 states have internal predecessors, (356), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-12-15 21:23:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:28,774 INFO L93 Difference]: Finished difference Result 576 states and 1038 transitions. [2023-12-15 21:23:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 21:23:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) Word has length 467 [2023-12-15 21:23:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:28,783 INFO L225 Difference]: With dead ends: 576 [2023-12-15 21:23:28,783 INFO L226 Difference]: Without dead ends: 287 [2023-12-15 21:23:28,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:23:28,788 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:28,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 475 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-12-15 21:23:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-12-15 21:23:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 219 states have (on average 1.5799086757990868) internal successors, (346), 219 states have internal predecessors, (346), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-15 21:23:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 478 transitions. [2023-12-15 21:23:28,831 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 478 transitions. Word has length 467 [2023-12-15 21:23:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:28,831 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 478 transitions. [2023-12-15 21:23:28,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-12-15 21:23:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 478 transitions. [2023-12-15 21:23:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:28,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:28,839 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:28,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:29,046 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 21:23:29,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:29,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:29,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1079345567, now seen corresponding path program 1 times [2023-12-15 21:23:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263906283] [2023-12-15 21:23:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:29,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:29,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:29,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080307169] [2023-12-15 21:23:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:29,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:29,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:29,180 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 21:23:29,200 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 21:23:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:29,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:29,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:29,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:29,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263906283] [2023-12-15 21:23:29,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:29,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080307169] [2023-12-15 21:23:29,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080307169] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:29,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:29,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738277402] [2023-12-15 21:23:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:29,589 INFO L87 Difference]: Start difference. First operand 287 states and 478 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:29,710 INFO L93 Difference]: Finished difference Result 856 states and 1426 transitions. [2023-12-15 21:23:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-12-15 21:23:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:29,714 INFO L225 Difference]: With dead ends: 856 [2023-12-15 21:23:29,714 INFO L226 Difference]: Without dead ends: 570 [2023-12-15 21:23:29,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:29,716 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 463 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:29,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 926 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:23:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-12-15 21:23:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 393. [2023-12-15 21:23:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 325 states have (on average 1.633846153846154) internal successors, (531), 325 states have internal predecessors, (531), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-15 21:23:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 663 transitions. [2023-12-15 21:23:29,757 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 663 transitions. Word has length 467 [2023-12-15 21:23:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:29,759 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 663 transitions. [2023-12-15 21:23:29,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 663 transitions. [2023-12-15 21:23:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:29,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:29,778 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:29,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:29,985 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 21:23:29,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:29,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1488960605, now seen corresponding path program 1 times [2023-12-15 21:23:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:29,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287473369] [2023-12-15 21:23:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:30,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118024658] [2023-12-15 21:23:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:30,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:30,093 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 21:23:30,108 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 21:23:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:30,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:30,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:30,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:30,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:30,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287473369] [2023-12-15 21:23:30,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:30,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118024658] [2023-12-15 21:23:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118024658] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:30,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:30,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572200261] [2023-12-15 21:23:30,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:30,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:30,466 INFO L87 Difference]: Start difference. First operand 393 states and 663 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:30,533 INFO L93 Difference]: Finished difference Result 1169 states and 1971 transitions. [2023-12-15 21:23:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-12-15 21:23:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:30,539 INFO L225 Difference]: With dead ends: 1169 [2023-12-15 21:23:30,539 INFO L226 Difference]: Without dead ends: 777 [2023-12-15 21:23:30,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:30,540 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 458 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:30,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1099 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2023-12-15 21:23:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 445. [2023-12-15 21:23:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 377 states have (on average 1.6392572944297081) internal successors, (618), 377 states have internal predecessors, (618), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-15 21:23:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 750 transitions. [2023-12-15 21:23:30,559 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 750 transitions. Word has length 467 [2023-12-15 21:23:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:30,560 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 750 transitions. [2023-12-15 21:23:30,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 750 transitions. [2023-12-15 21:23:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:30,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:30,563 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:30,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:30,770 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 21:23:30,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:30,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1872353437, now seen corresponding path program 1 times [2023-12-15 21:23:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:30,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810274142] [2023-12-15 21:23:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:30,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:30,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:30,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044821673] [2023-12-15 21:23:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:30,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:30,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:30,858 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 21:23:30,859 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 21:23:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:31,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:31,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:31,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:31,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810274142] [2023-12-15 21:23:31,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:31,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044821673] [2023-12-15 21:23:31,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044821673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:31,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:31,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931684641] [2023-12-15 21:23:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:31,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:31,218 INFO L87 Difference]: Start difference. First operand 445 states and 750 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:31,270 INFO L93 Difference]: Finished difference Result 1211 states and 2043 transitions. [2023-12-15 21:23:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-12-15 21:23:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:31,273 INFO L225 Difference]: With dead ends: 1211 [2023-12-15 21:23:31,274 INFO L226 Difference]: Without dead ends: 767 [2023-12-15 21:23:31,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:31,275 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 284 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:31,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1157 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-12-15 21:23:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 764. [2023-12-15 21:23:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 665 states have (on average 1.6451127819548872) internal successors, (1094), 666 states have internal predecessors, (1094), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2023-12-15 21:23:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1286 transitions. [2023-12-15 21:23:31,295 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1286 transitions. Word has length 467 [2023-12-15 21:23:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:31,296 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1286 transitions. [2023-12-15 21:23:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1286 transitions. [2023-12-15 21:23:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:31,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:31,300 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:31,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-15 21:23:31,506 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 21:23:31,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:31,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1481506723, now seen corresponding path program 1 times [2023-12-15 21:23:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:31,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247092254] [2023-12-15 21:23:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:31,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:31,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233936759] [2023-12-15 21:23:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:31,559 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 21:23:31,584 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 21:23:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:31,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:31,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:31,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:31,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:31,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247092254] [2023-12-15 21:23:31,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233936759] [2023-12-15 21:23:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233936759] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:31,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:31,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320476879] [2023-12-15 21:23:31,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:31,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:31,974 INFO L87 Difference]: Start difference. First operand 764 states and 1286 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:32,047 INFO L93 Difference]: Finished difference Result 2223 states and 3741 transitions. [2023-12-15 21:23:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-12-15 21:23:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:32,053 INFO L225 Difference]: With dead ends: 2223 [2023-12-15 21:23:32,053 INFO L226 Difference]: Without dead ends: 1460 [2023-12-15 21:23:32,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:32,055 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 319 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:32,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1136 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:23:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2023-12-15 21:23:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1457. [2023-12-15 21:23:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1292 states have (on average 1.6393188854489165) internal successors, (2118), 1295 states have internal predecessors, (2118), 160 states have call successors, (160), 4 states have call predecessors, (160), 4 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2023-12-15 21:23:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2438 transitions. [2023-12-15 21:23:32,087 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2438 transitions. Word has length 467 [2023-12-15 21:23:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:32,088 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 2438 transitions. [2023-12-15 21:23:32,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2438 transitions. [2023-12-15 21:23:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:32,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:32,092 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:32,101 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 21:23:32,301 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 21:23:32,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:32,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash -155420063, now seen corresponding path program 1 times [2023-12-15 21:23:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470433838] [2023-12-15 21:23:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:32,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:32,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198521861] [2023-12-15 21:23:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:32,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:32,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:32,349 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 21:23:32,350 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 21:23:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:32,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 21:23:32,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:32,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:32,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470433838] [2023-12-15 21:23:32,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:32,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198521861] [2023-12-15 21:23:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198521861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:32,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:32,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:23:32,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760532097] [2023-12-15 21:23:32,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:32,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:23:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:23:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:32,796 INFO L87 Difference]: Start difference. First operand 1457 states and 2438 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:33,127 INFO L93 Difference]: Finished difference Result 2996 states and 5004 transitions. [2023-12-15 21:23:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:23:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-12-15 21:23:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:33,133 INFO L225 Difference]: With dead ends: 2996 [2023-12-15 21:23:33,133 INFO L226 Difference]: Without dead ends: 1540 [2023-12-15 21:23:33,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:23:33,138 INFO L413 NwaCegarLoop]: 900 mSDtfsCounter, 746 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:33,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 2460 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2023-12-15 21:23:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1288. [2023-12-15 21:23:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1152 states have (on average 1.6336805555555556) internal successors, (1882), 1154 states have internal predecessors, (1882), 130 states have call successors, (130), 5 states have call predecessors, (130), 5 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-12-15 21:23:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2142 transitions. [2023-12-15 21:23:33,170 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2142 transitions. Word has length 467 [2023-12-15 21:23:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:33,171 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 2142 transitions. [2023-12-15 21:23:33,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2142 transitions. [2023-12-15 21:23:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-12-15 21:23:33,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:33,175 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:33,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:33,382 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 21:23:33,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:33,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2021224875, now seen corresponding path program 1 times [2023-12-15 21:23:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:33,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309684562] [2023-12-15 21:23:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:33,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:33,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128971628] [2023-12-15 21:23:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:33,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:33,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:33,452 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 21:23:33,454 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 21:23:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:33,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:23:33,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:33,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:33,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309684562] [2023-12-15 21:23:33,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128971628] [2023-12-15 21:23:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128971628] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:33,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:33,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:33,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263419991] [2023-12-15 21:23:33,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:33,765 INFO L87 Difference]: Start difference. First operand 1288 states and 2142 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:34,193 INFO L93 Difference]: Finished difference Result 3820 states and 6320 transitions. [2023-12-15 21:23:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:23:34,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 468 [2023-12-15 21:23:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:34,201 INFO L225 Difference]: With dead ends: 3820 [2023-12-15 21:23:34,201 INFO L226 Difference]: Without dead ends: 2517 [2023-12-15 21:23:34,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:34,203 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1224 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:34,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 1703 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2023-12-15 21:23:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1325. [2023-12-15 21:23:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1189 states have (on average 1.6324642556770395) internal successors, (1941), 1191 states have internal predecessors, (1941), 130 states have call successors, (130), 5 states have call predecessors, (130), 5 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-12-15 21:23:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2201 transitions. [2023-12-15 21:23:34,250 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2201 transitions. Word has length 468 [2023-12-15 21:23:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:34,251 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 2201 transitions. [2023-12-15 21:23:34,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2201 transitions. [2023-12-15 21:23:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-12-15 21:23:34,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:34,255 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:34,262 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 21:23:34,462 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 21:23:34,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:34,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2056957967, now seen corresponding path program 1 times [2023-12-15 21:23:34,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:34,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950660578] [2023-12-15 21:23:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:34,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:34,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029990244] [2023-12-15 21:23:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:34,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:34,557 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 21:23:34,613 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 21:23:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:35,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:35,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4353 proven. 99 refuted. 0 times theorem prover too weak. 4128 trivial. 0 not checked. [2023-12-15 21:23:35,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 96 proven. 99 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:23:35,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:35,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950660578] [2023-12-15 21:23:35,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029990244] [2023-12-15 21:23:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029990244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:35,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:35,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:35,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902207555] [2023-12-15 21:23:35,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:35,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:35,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:35,667 INFO L87 Difference]: Start difference. First operand 1325 states and 2201 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2023-12-15 21:23:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:35,991 INFO L93 Difference]: Finished difference Result 2667 states and 4417 transitions. [2023-12-15 21:23:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) Word has length 468 [2023-12-15 21:23:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:35,996 INFO L225 Difference]: With dead ends: 2667 [2023-12-15 21:23:35,996 INFO L226 Difference]: Without dead ends: 1343 [2023-12-15 21:23:35,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 928 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:35,999 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 280 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:35,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1033 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2023-12-15 21:23:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1333. [2023-12-15 21:23:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1195 states have (on average 1.6158995815899582) internal successors, (1931), 1197 states have internal predecessors, (1931), 130 states have call successors, (130), 7 states have call predecessors, (130), 7 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-12-15 21:23:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2191 transitions. [2023-12-15 21:23:36,041 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2191 transitions. Word has length 468 [2023-12-15 21:23:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:36,041 INFO L495 AbstractCegarLoop]: Abstraction has 1333 states and 2191 transitions. [2023-12-15 21:23:36,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2023-12-15 21:23:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2191 transitions. [2023-12-15 21:23:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-12-15 21:23:36,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:36,045 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:36,058 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 21:23:36,253 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 21:23:36,253 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:36,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2120793753, now seen corresponding path program 1 times [2023-12-15 21:23:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912443204] [2023-12-15 21:23:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:36,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:36,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071277136] [2023-12-15 21:23:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:36,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:36,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:36,322 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 21:23:36,377 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 21:23:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:36,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:36,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:36,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912443204] [2023-12-15 21:23:36,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071277136] [2023-12-15 21:23:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071277136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:36,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:36,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:36,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867487404] [2023-12-15 21:23:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:36,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:36,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:36,781 INFO L87 Difference]: Start difference. First operand 1333 states and 2191 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:36,862 INFO L93 Difference]: Finished difference Result 3108 states and 5069 transitions. [2023-12-15 21:23:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 468 [2023-12-15 21:23:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:36,868 INFO L225 Difference]: With dead ends: 3108 [2023-12-15 21:23:36,869 INFO L226 Difference]: Without dead ends: 1750 [2023-12-15 21:23:36,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:36,871 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 394 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:36,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1319 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2023-12-15 21:23:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1314. [2023-12-15 21:23:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1176 states have (on average 1.6045918367346939) internal successors, (1887), 1178 states have internal predecessors, (1887), 130 states have call successors, (130), 7 states have call predecessors, (130), 7 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-12-15 21:23:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2147 transitions. [2023-12-15 21:23:36,915 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2147 transitions. Word has length 468 [2023-12-15 21:23:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:36,915 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 2147 transitions. [2023-12-15 21:23:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2147 transitions. [2023-12-15 21:23:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-12-15 21:23:36,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:36,919 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:36,928 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 21:23:37,126 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 21:23:37,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:37,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1121486370, now seen corresponding path program 1 times [2023-12-15 21:23:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:37,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754027010] [2023-12-15 21:23:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:37,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:37,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215661315] [2023-12-15 21:23:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:37,182 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 21:23:37,183 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 21:23:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:37,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 21:23:37,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:38,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:38,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754027010] [2023-12-15 21:23:38,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215661315] [2023-12-15 21:23:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215661315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:38,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666082582] [2023-12-15 21:23:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:38,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:38,397 INFO L87 Difference]: Start difference. First operand 1314 states and 2147 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:38,623 INFO L93 Difference]: Finished difference Result 3753 states and 6142 transitions. [2023-12-15 21:23:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:23:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 469 [2023-12-15 21:23:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:38,632 INFO L225 Difference]: With dead ends: 3753 [2023-12-15 21:23:38,632 INFO L226 Difference]: Without dead ends: 2440 [2023-12-15 21:23:38,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:38,635 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 533 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:38,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1544 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2023-12-15 21:23:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1455. [2023-12-15 21:23:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1247 states have (on average 1.5829991980753808) internal successors, (1974), 1249 states have internal predecessors, (1974), 196 states have call successors, (196), 11 states have call predecessors, (196), 11 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-15 21:23:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2366 transitions. [2023-12-15 21:23:38,745 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2366 transitions. Word has length 469 [2023-12-15 21:23:38,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:38,746 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 2366 transitions. [2023-12-15 21:23:38,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:38,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2366 transitions. [2023-12-15 21:23:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-12-15 21:23:38,749 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:38,749 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:38,770 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 21:23:38,970 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 21:23:38,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:38,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1760957765, now seen corresponding path program 1 times [2023-12-15 21:23:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:38,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136396380] [2023-12-15 21:23:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:39,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559060490] [2023-12-15 21:23:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:39,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:39,008 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 21:23:39,024 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 21:23:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:39,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 21:23:39,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:39,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136396380] [2023-12-15 21:23:39,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559060490] [2023-12-15 21:23:39,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559060490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:39,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:39,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:23:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265956408] [2023-12-15 21:23:39,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:39,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:23:39,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:23:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:23:39,780 INFO L87 Difference]: Start difference. First operand 1455 states and 2366 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:40,358 INFO L93 Difference]: Finished difference Result 6567 states and 10672 transitions. [2023-12-15 21:23:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 469 [2023-12-15 21:23:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:40,377 INFO L225 Difference]: With dead ends: 6567 [2023-12-15 21:23:40,377 INFO L226 Difference]: Without dead ends: 5254 [2023-12-15 21:23:40,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:23:40,381 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 2311 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:40,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2311 Valid, 2701 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:23:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2023-12-15 21:23:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 2722. [2023-12-15 21:23:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2377 states have (on average 1.56541859486748) internal successors, (3721), 2381 states have internal predecessors, (3721), 326 states have call successors, (326), 18 states have call predecessors, (326), 18 states have return successors, (326), 322 states have call predecessors, (326), 326 states have call successors, (326) [2023-12-15 21:23:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 4373 transitions. [2023-12-15 21:23:40,512 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 4373 transitions. Word has length 469 [2023-12-15 21:23:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:40,512 INFO L495 AbstractCegarLoop]: Abstraction has 2722 states and 4373 transitions. [2023-12-15 21:23:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 4373 transitions. [2023-12-15 21:23:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-12-15 21:23:40,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:40,517 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:40,540 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 21:23:40,725 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 21:23:40,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:40,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash 484621689, now seen corresponding path program 1 times [2023-12-15 21:23:40,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503298584] [2023-12-15 21:23:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:40,764 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:40,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406879435] [2023-12-15 21:23:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:40,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:40,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:40,784 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 21:23:40,792 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 21:23:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:41,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:23:41,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:41,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:41,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503298584] [2023-12-15 21:23:41,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406879435] [2023-12-15 21:23:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406879435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:41,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-15 21:23:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181175015] [2023-12-15 21:23:41,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 21:23:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 21:23:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:41,677 INFO L87 Difference]: Start difference. First operand 2722 states and 4373 transitions. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:43,742 INFO L93 Difference]: Finished difference Result 13021 states and 20644 transitions. [2023-12-15 21:23:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-15 21:23:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 469 [2023-12-15 21:23:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:43,782 INFO L225 Difference]: With dead ends: 13021 [2023-12-15 21:23:43,783 INFO L226 Difference]: Without dead ends: 10441 [2023-12-15 21:23:43,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-12-15 21:23:43,791 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 3098 mSDsluCounter, 4433 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3098 SdHoareTripleChecker+Valid, 5371 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:43,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3098 Valid, 5371 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-15 21:23:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2023-12-15 21:23:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 7563. [2023-12-15 21:23:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7563 states, 6802 states have (on average 1.5554248750367539) internal successors, (10580), 6822 states have internal predecessors, (10580), 712 states have call successors, (712), 48 states have call predecessors, (712), 48 states have return successors, (712), 692 states have call predecessors, (712), 712 states have call successors, (712) [2023-12-15 21:23:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7563 states to 7563 states and 12004 transitions. [2023-12-15 21:23:44,110 INFO L78 Accepts]: Start accepts. Automaton has 7563 states and 12004 transitions. Word has length 469 [2023-12-15 21:23:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:44,110 INFO L495 AbstractCegarLoop]: Abstraction has 7563 states and 12004 transitions. [2023-12-15 21:23:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7563 states and 12004 transitions. [2023-12-15 21:23:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-12-15 21:23:44,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:44,116 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:44,125 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 21:23:44,322 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 21:23:44,323 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:44,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1543964421, now seen corresponding path program 1 times [2023-12-15 21:23:44,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104547557] [2023-12-15 21:23:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:44,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:44,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200112409] [2023-12-15 21:23:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:44,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:44,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:44,398 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 21:23:44,398 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 21:23:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:44,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:44,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 2375 proven. 30 refuted. 0 times theorem prover too weak. 6175 trivial. 0 not checked. [2023-12-15 21:23:44,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 165 proven. 30 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:23:45,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104547557] [2023-12-15 21:23:45,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200112409] [2023-12-15 21:23:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200112409] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:45,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:45,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 21:23:45,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290530571] [2023-12-15 21:23:45,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:45,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:23:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:23:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:23:45,295 INFO L87 Difference]: Start difference. First operand 7563 states and 12004 transitions. Second operand has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 21:23:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:45,813 INFO L93 Difference]: Finished difference Result 15060 states and 23859 transitions. [2023-12-15 21:23:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 469 [2023-12-15 21:23:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:45,827 INFO L225 Difference]: With dead ends: 15060 [2023-12-15 21:23:45,827 INFO L226 Difference]: Without dead ends: 7639 [2023-12-15 21:23:45,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:23:45,837 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 317 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:45,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1045 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7639 states. [2023-12-15 21:23:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7639 to 7583. [2023-12-15 21:23:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7583 states, 6817 states have (on average 1.5471615079947192) internal successors, (10547), 6837 states have internal predecessors, (10547), 712 states have call successors, (712), 53 states have call predecessors, (712), 53 states have return successors, (712), 692 states have call predecessors, (712), 712 states have call successors, (712) [2023-12-15 21:23:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7583 states to 7583 states and 11971 transitions. [2023-12-15 21:23:46,066 INFO L78 Accepts]: Start accepts. Automaton has 7583 states and 11971 transitions. Word has length 469 [2023-12-15 21:23:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:46,067 INFO L495 AbstractCegarLoop]: Abstraction has 7583 states and 11971 transitions. [2023-12-15 21:23:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 21:23:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7583 states and 11971 transitions. [2023-12-15 21:23:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-12-15 21:23:46,072 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:46,073 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:46,096 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 21:23:46,297 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 21:23:46,297 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:46,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:46,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1645391522, now seen corresponding path program 1 times [2023-12-15 21:23:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:46,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463968346] [2023-12-15 21:23:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:46,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:46,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984871687] [2023-12-15 21:23:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:46,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:46,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:46,362 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 21:23:46,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 21:23:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:46,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:46,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 1163 proven. 12 refuted. 0 times theorem prover too weak. 7405 trivial. 0 not checked. [2023-12-15 21:23:46,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 183 proven. 12 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:23:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:46,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463968346] [2023-12-15 21:23:46,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984871687] [2023-12-15 21:23:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984871687] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:46,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049501509] [2023-12-15 21:23:46,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:46,995 INFO L87 Difference]: Start difference. First operand 7583 states and 11971 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-12-15 21:23:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:47,437 INFO L93 Difference]: Finished difference Result 15106 states and 23800 transitions. [2023-12-15 21:23:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) Word has length 470 [2023-12-15 21:23:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:47,451 INFO L225 Difference]: With dead ends: 15106 [2023-12-15 21:23:47,451 INFO L226 Difference]: Without dead ends: 7669 [2023-12-15 21:23:47,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:47,463 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 692 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:47,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1056 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2023-12-15 21:23:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 7603. [2023-12-15 21:23:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7603 states, 6832 states have (on average 1.5436182669789227) internal successors, (10546), 6852 states have internal predecessors, (10546), 712 states have call successors, (712), 58 states have call predecessors, (712), 58 states have return successors, (712), 692 states have call predecessors, (712), 712 states have call successors, (712) [2023-12-15 21:23:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7603 states to 7603 states and 11970 transitions. [2023-12-15 21:23:47,794 INFO L78 Accepts]: Start accepts. Automaton has 7603 states and 11970 transitions. Word has length 470 [2023-12-15 21:23:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:47,795 INFO L495 AbstractCegarLoop]: Abstraction has 7603 states and 11970 transitions. [2023-12-15 21:23:47,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-12-15 21:23:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7603 states and 11970 transitions. [2023-12-15 21:23:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-12-15 21:23:47,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:47,802 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:47,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:48,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:48,009 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:48,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1507073308, now seen corresponding path program 1 times [2023-12-15 21:23:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296403596] [2023-12-15 21:23:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:48,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:48,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069519953] [2023-12-15 21:23:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:48,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:48,059 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:48,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 21:23:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:48,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:48,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4343 proven. 102 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-12-15 21:23:48,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 93 proven. 102 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:23:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296403596] [2023-12-15 21:23:48,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069519953] [2023-12-15 21:23:48,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069519953] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:48,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:48,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:48,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692405186] [2023-12-15 21:23:48,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:48,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:48,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:48,890 INFO L87 Difference]: Start difference. First operand 7603 states and 11970 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-12-15 21:23:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:49,324 INFO L93 Difference]: Finished difference Result 12458 states and 19569 transitions. [2023-12-15 21:23:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) Word has length 470 [2023-12-15 21:23:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:49,334 INFO L225 Difference]: With dead ends: 12458 [2023-12-15 21:23:49,334 INFO L226 Difference]: Without dead ends: 5005 [2023-12-15 21:23:49,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:49,345 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 607 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:49,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1027 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2023-12-15 21:23:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 4939. [2023-12-15 21:23:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4321 states have (on average 1.5295070585512613) internal successors, (6609), 4333 states have internal predecessors, (6609), 556 states have call successors, (556), 61 states have call predecessors, (556), 61 states have return successors, (556), 544 states have call predecessors, (556), 556 states have call successors, (556) [2023-12-15 21:23:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 7721 transitions. [2023-12-15 21:23:49,581 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 7721 transitions. Word has length 470 [2023-12-15 21:23:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:49,582 INFO L495 AbstractCegarLoop]: Abstraction has 4939 states and 7721 transitions. [2023-12-15 21:23:49,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-12-15 21:23:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 7721 transitions. [2023-12-15 21:23:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-12-15 21:23:49,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:49,586 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:49,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:49,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 21:23:49,794 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:49,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash 915623801, now seen corresponding path program 1 times [2023-12-15 21:23:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887899571] [2023-12-15 21:23:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:49,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:49,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:49,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82543469] [2023-12-15 21:23:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:49,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:49,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:49,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:49,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 21:23:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:50,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:23:50,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:50,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:50,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887899571] [2023-12-15 21:23:50,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82543469] [2023-12-15 21:23:50,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82543469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:50,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514379498] [2023-12-15 21:23:50,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:50,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:50,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:50,315 INFO L87 Difference]: Start difference. First operand 4939 states and 7721 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:50,497 INFO L93 Difference]: Finished difference Result 7422 states and 11639 transitions. [2023-12-15 21:23:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:23:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 470 [2023-12-15 21:23:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:50,525 INFO L225 Difference]: With dead ends: 7422 [2023-12-15 21:23:50,525 INFO L226 Difference]: Without dead ends: 1734 [2023-12-15 21:23:50,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:50,532 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 446 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:50,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1015 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:23:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-12-15 21:23:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1302. [2023-12-15 21:23:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1082 states have (on average 1.4861367837338262) internal successors, (1608), 1082 states have internal predecessors, (1608), 198 states have call successors, (198), 21 states have call predecessors, (198), 21 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-12-15 21:23:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2004 transitions. [2023-12-15 21:23:50,607 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2004 transitions. Word has length 470 [2023-12-15 21:23:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:50,607 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2004 transitions. [2023-12-15 21:23:50,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2004 transitions. [2023-12-15 21:23:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-12-15 21:23:50,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:50,610 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:50,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-15 21:23:50,818 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:50,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1455520354, now seen corresponding path program 1 times [2023-12-15 21:23:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:50,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488087422] [2023-12-15 21:23:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:50,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:50,857 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181701577] [2023-12-15 21:23:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:50,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:50,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:50,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 21:23:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:51,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:51,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:51,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488087422] [2023-12-15 21:23:51,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181701577] [2023-12-15 21:23:51,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181701577] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:51,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:51,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540607697] [2023-12-15 21:23:51,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:51,240 INFO L87 Difference]: Start difference. First operand 1302 states and 2004 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:51,325 INFO L93 Difference]: Finished difference Result 2576 states and 3983 transitions. [2023-12-15 21:23:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:23:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-12-15 21:23:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:51,330 INFO L225 Difference]: With dead ends: 2576 [2023-12-15 21:23:51,330 INFO L226 Difference]: Without dead ends: 1428 [2023-12-15 21:23:51,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:51,332 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 131 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:51,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1357 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-12-15 21:23:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1302. [2023-12-15 21:23:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1082 states have (on average 1.4824399260628467) internal successors, (1604), 1082 states have internal predecessors, (1604), 198 states have call successors, (198), 21 states have call predecessors, (198), 21 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-12-15 21:23:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2000 transitions. [2023-12-15 21:23:51,419 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2000 transitions. Word has length 471 [2023-12-15 21:23:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:51,419 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2000 transitions. [2023-12-15 21:23:51,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2000 transitions. [2023-12-15 21:23:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-12-15 21:23:51,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:51,422 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:51,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:51,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-15 21:23:51,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:51,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1356791565, now seen corresponding path program 1 times [2023-12-15 21:23:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083708048] [2023-12-15 21:23:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:51,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:51,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783737864] [2023-12-15 21:23:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:51,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:51,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:51,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 21:23:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:52,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:52,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4335 proven. 90 refuted. 0 times theorem prover too weak. 4155 trivial. 0 not checked. [2023-12-15 21:23:52,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 105 proven. 90 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:23:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083708048] [2023-12-15 21:23:52,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783737864] [2023-12-15 21:23:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783737864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334250060] [2023-12-15 21:23:52,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:52,479 INFO L87 Difference]: Start difference. First operand 1302 states and 2000 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-12-15 21:23:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:52,892 INFO L93 Difference]: Finished difference Result 2214 states and 3382 transitions. [2023-12-15 21:23:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 471 [2023-12-15 21:23:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:52,895 INFO L225 Difference]: With dead ends: 2214 [2023-12-15 21:23:52,895 INFO L226 Difference]: Without dead ends: 1025 [2023-12-15 21:23:52,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 934 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:52,898 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 896 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:52,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 972 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-12-15 21:23:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 969. [2023-12-15 21:23:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 746 states have (on average 1.4289544235924934) internal successors, (1066), 746 states have internal predecessors, (1066), 198 states have call successors, (198), 24 states have call predecessors, (198), 24 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-12-15 21:23:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1462 transitions. [2023-12-15 21:23:52,955 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1462 transitions. Word has length 471 [2023-12-15 21:23:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:52,955 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1462 transitions. [2023-12-15 21:23:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-12-15 21:23:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1462 transitions. [2023-12-15 21:23:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-12-15 21:23:52,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:52,958 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:52,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:53,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 21:23:53,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:53,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1378625560, now seen corresponding path program 1 times [2023-12-15 21:23:53,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:53,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894797633] [2023-12-15 21:23:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:53,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:53,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:53,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644388289] [2023-12-15 21:23:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:53,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:53,200 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:53,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 21:23:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:53,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:23:53,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:54,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:54,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894797633] [2023-12-15 21:23:54,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644388289] [2023-12-15 21:23:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644388289] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:54,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:54,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840902565] [2023-12-15 21:23:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:23:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:23:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:54,372 INFO L87 Difference]: Start difference. First operand 969 states and 1462 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:54,753 INFO L93 Difference]: Finished difference Result 2363 states and 3581 transitions. [2023-12-15 21:23:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:23:54,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 472 [2023-12-15 21:23:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:54,756 INFO L225 Difference]: With dead ends: 2363 [2023-12-15 21:23:54,757 INFO L226 Difference]: Without dead ends: 1534 [2023-12-15 21:23:54,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:23:54,759 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 750 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:54,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1858 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2023-12-15 21:23:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1369. [2023-12-15 21:23:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1072 states have (on average 1.4337686567164178) internal successors, (1537), 1072 states have internal predecessors, (1537), 264 states have call successors, (264), 32 states have call predecessors, (264), 32 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2023-12-15 21:23:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2065 transitions. [2023-12-15 21:23:54,840 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2065 transitions. Word has length 472 [2023-12-15 21:23:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:54,842 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2065 transitions. [2023-12-15 21:23:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2065 transitions. [2023-12-15 21:23:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-12-15 21:23:54,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:54,845 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:54,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:55,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:55,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1375001796, now seen corresponding path program 1 times [2023-12-15 21:23:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:55,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444913213] [2023-12-15 21:23:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:55,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142343510] [2023-12-15 21:23:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:55,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:55,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-15 21:23:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:55,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:23:55,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:56,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444913213] [2023-12-15 21:23:56,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142343510] [2023-12-15 21:23:56,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142343510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:56,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:56,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841902642] [2023-12-15 21:23:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:56,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:56,323 INFO L87 Difference]: Start difference. First operand 1369 states and 2065 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:56,601 INFO L93 Difference]: Finished difference Result 2856 states and 4326 transitions. [2023-12-15 21:23:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:23:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 473 [2023-12-15 21:23:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:56,624 INFO L225 Difference]: With dead ends: 2856 [2023-12-15 21:23:56,625 INFO L226 Difference]: Without dead ends: 1627 [2023-12-15 21:23:56,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:56,627 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 349 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:56,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1325 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2023-12-15 21:23:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1369. [2023-12-15 21:23:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1072 states have (on average 1.4328358208955223) internal successors, (1536), 1072 states have internal predecessors, (1536), 264 states have call successors, (264), 32 states have call predecessors, (264), 32 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2023-12-15 21:23:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2064 transitions. [2023-12-15 21:23:56,704 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2064 transitions. Word has length 473 [2023-12-15 21:23:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:56,705 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2064 transitions. [2023-12-15 21:23:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2064 transitions. [2023-12-15 21:23:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-12-15 21:23:56,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:56,708 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:56,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-15 21:23:56,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:56,915 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:56,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:56,915 INFO L85 PathProgramCache]: Analyzing trace with hash 491706878, now seen corresponding path program 1 times [2023-12-15 21:23:56,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:56,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946720113] [2023-12-15 21:23:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:56,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:56,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055859784] [2023-12-15 21:23:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:56,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:56,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:56,966 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:56,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-15 21:23:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:57,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 21:23:57,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:57,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:57,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946720113] [2023-12-15 21:23:57,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055859784] [2023-12-15 21:23:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055859784] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:57,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:23:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826064580] [2023-12-15 21:23:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:57,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:23:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:23:57,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:23:57,843 INFO L87 Difference]: Start difference. First operand 1369 states and 2064 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:58,380 INFO L93 Difference]: Finished difference Result 3853 states and 5805 transitions. [2023-12-15 21:23:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 473 [2023-12-15 21:23:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:58,386 INFO L225 Difference]: With dead ends: 3853 [2023-12-15 21:23:58,386 INFO L226 Difference]: Without dead ends: 2633 [2023-12-15 21:23:58,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:23:58,389 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2262 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:58,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 1450 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:23:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2023-12-15 21:23:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1439. [2023-12-15 21:23:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1138 states have (on average 1.4182776801405976) internal successors, (1614), 1138 states have internal predecessors, (1614), 264 states have call successors, (264), 36 states have call predecessors, (264), 36 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2023-12-15 21:23:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2142 transitions. [2023-12-15 21:23:58,518 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2142 transitions. Word has length 473 [2023-12-15 21:23:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:58,519 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2142 transitions. [2023-12-15 21:23:58,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:23:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2142 transitions. [2023-12-15 21:23:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-12-15 21:23:58,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:58,524 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:58,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:58,725 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:58,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1254600026, now seen corresponding path program 1 times [2023-12-15 21:23:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862633188] [2023-12-15 21:23:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:58,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:58,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842270709] [2023-12-15 21:23:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:58,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:58,777 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:58,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-15 21:23:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:59,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:23:59,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:23:59,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:59,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862633188] [2023-12-15 21:23:59,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842270709] [2023-12-15 21:23:59,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842270709] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:59,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:59,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-15 21:23:59,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613009957] [2023-12-15 21:23:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:59,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 21:23:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 21:23:59,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:59,262 INFO L87 Difference]: Start difference. First operand 1439 states and 2142 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:24:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:00,915 INFO L93 Difference]: Finished difference Result 7381 states and 11122 transitions. [2023-12-15 21:24:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-15 21:24:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 474 [2023-12-15 21:24:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:00,927 INFO L225 Difference]: With dead ends: 7381 [2023-12-15 21:24:00,927 INFO L226 Difference]: Without dead ends: 6517 [2023-12-15 21:24:00,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 21:24:00,931 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 3910 mSDsluCounter, 5488 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3910 SdHoareTripleChecker+Valid, 6445 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:00,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3910 Valid, 6445 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 21:24:00,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6517 states. [2023-12-15 21:24:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6517 to 4410. [2023-12-15 21:24:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 3838 states have (on average 1.4702970297029703) internal successors, (5643), 3847 states have internal predecessors, (5643), 498 states have call successors, (498), 73 states have call predecessors, (498), 73 states have return successors, (498), 489 states have call predecessors, (498), 498 states have call successors, (498) [2023-12-15 21:24:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 6639 transitions. [2023-12-15 21:24:01,170 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 6639 transitions. Word has length 474 [2023-12-15 21:24:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:01,171 INFO L495 AbstractCegarLoop]: Abstraction has 4410 states and 6639 transitions. [2023-12-15 21:24:01,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:24:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 6639 transitions. [2023-12-15 21:24:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-12-15 21:24:01,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:01,174 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:01,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:01,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:01,382 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:01,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2130619032, now seen corresponding path program 1 times [2023-12-15 21:24:01,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:01,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050130978] [2023-12-15 21:24:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:01,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:01,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:01,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478334597] [2023-12-15 21:24:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:01,433 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:01,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-15 21:24:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:01,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:24:01,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-12-15 21:24:01,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:24:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050130978] [2023-12-15 21:24:01,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478334597] [2023-12-15 21:24:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478334597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:24:01,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:24:01,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-15 21:24:01,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402411729] [2023-12-15 21:24:01,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:24:01,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 21:24:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 21:24:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:24:01,938 INFO L87 Difference]: Start difference. First operand 4410 states and 6639 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:24:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:03,686 INFO L93 Difference]: Finished difference Result 10129 states and 15266 transitions. [2023-12-15 21:24:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-15 21:24:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 474 [2023-12-15 21:24:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:03,695 INFO L225 Difference]: With dead ends: 10129 [2023-12-15 21:24:03,695 INFO L226 Difference]: Without dead ends: 6525 [2023-12-15 21:24:03,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2023-12-15 21:24:03,700 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 3267 mSDsluCounter, 5545 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3267 SdHoareTripleChecker+Valid, 6655 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:03,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3267 Valid, 6655 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 21:24:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6525 states. [2023-12-15 21:24:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6525 to 4480. [2023-12-15 21:24:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 3872 states have (on average 1.4641012396694215) internal successors, (5669), 3881 states have internal predecessors, (5669), 530 states have call successors, (530), 77 states have call predecessors, (530), 77 states have return successors, (530), 521 states have call predecessors, (530), 530 states have call successors, (530) [2023-12-15 21:24:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6729 transitions. [2023-12-15 21:24:03,907 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6729 transitions. Word has length 474 [2023-12-15 21:24:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:03,907 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 6729 transitions. [2023-12-15 21:24:03,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-12-15 21:24:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6729 transitions. [2023-12-15 21:24:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-12-15 21:24:03,910 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:03,910 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:03,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:04,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:04,117 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:04,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1688329112, now seen corresponding path program 1 times [2023-12-15 21:24:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833407346] [2023-12-15 21:24:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:04,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309074603] [2023-12-15 21:24:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:04,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:04,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:04,155 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:04,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-15 21:24:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:04,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:24:04,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 2912 proven. 0 refuted. 0 times theorem prover too weak. 5668 trivial. 0 not checked. [2023-12-15 21:24:05,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:24:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833407346] [2023-12-15 21:24:05,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309074603] [2023-12-15 21:24:05,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309074603] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:24:05,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:24:05,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:24:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987424744] [2023-12-15 21:24:05,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:24:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:24:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:24:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:24:05,458 INFO L87 Difference]: Start difference. First operand 4480 states and 6729 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2023-12-15 21:24:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:06,152 INFO L93 Difference]: Finished difference Result 10808 states and 16290 transitions. [2023-12-15 21:24:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:24:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) Word has length 474 [2023-12-15 21:24:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:06,161 INFO L225 Difference]: With dead ends: 10808 [2023-12-15 21:24:06,162 INFO L226 Difference]: Without dead ends: 6481 [2023-12-15 21:24:06,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:24:06,167 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 1026 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:06,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 2358 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:24:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2023-12-15 21:24:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 6475. [2023-12-15 21:24:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 5661 states have (on average 1.4734145910616498) internal successors, (8341), 5675 states have internal predecessors, (8341), 712 states have call successors, (712), 101 states have call predecessors, (712), 101 states have return successors, (712), 698 states have call predecessors, (712), 712 states have call successors, (712) [2023-12-15 21:24:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 9765 transitions. [2023-12-15 21:24:06,472 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 9765 transitions. Word has length 474 [2023-12-15 21:24:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:06,472 INFO L495 AbstractCegarLoop]: Abstraction has 6475 states and 9765 transitions. [2023-12-15 21:24:06,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2023-12-15 21:24:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 9765 transitions. [2023-12-15 21:24:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-12-15 21:24:06,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:06,476 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:06,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:06,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:06,683 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:06,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash 112097560, now seen corresponding path program 1 times [2023-12-15 21:24:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:06,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533133607] [2023-12-15 21:24:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:06,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:06,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487133220] [2023-12-15 21:24:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:06,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:06,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:06,770 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:06,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-15 21:24:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:07,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 21:24:07,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 3779 proven. 3 refuted. 0 times theorem prover too weak. 4798 trivial. 0 not checked. [2023-12-15 21:24:07,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 192 proven. 3 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:24:07,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:07,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533133607] [2023-12-15 21:24:07,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487133220] [2023-12-15 21:24:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487133220] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:07,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:07,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-15 21:24:07,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788812791] [2023-12-15 21:24:07,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:07,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 21:24:07,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 21:24:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:24:07,914 INFO L87 Difference]: Start difference. First operand 6475 states and 9765 transitions. Second operand has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-12-15 21:24:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:09,261 INFO L93 Difference]: Finished difference Result 17736 states and 26862 transitions. [2023-12-15 21:24:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 21:24:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) Word has length 474 [2023-12-15 21:24:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:09,276 INFO L225 Difference]: With dead ends: 17736 [2023-12-15 21:24:09,276 INFO L226 Difference]: Without dead ends: 11416 [2023-12-15 21:24:09,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-12-15 21:24:09,284 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 2024 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 3038 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:09,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 3038 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 21:24:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2023-12-15 21:24:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 6479. [2023-12-15 21:24:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 5664 states have (on average 1.4728107344632768) internal successors, (8342), 5678 states have internal predecessors, (8342), 712 states have call successors, (712), 102 states have call predecessors, (712), 102 states have return successors, (712), 698 states have call predecessors, (712), 712 states have call successors, (712) [2023-12-15 21:24:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 9766 transitions. [2023-12-15 21:24:09,571 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 9766 transitions. Word has length 474 [2023-12-15 21:24:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:09,572 INFO L495 AbstractCegarLoop]: Abstraction has 6479 states and 9766 transitions. [2023-12-15 21:24:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-12-15 21:24:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 9766 transitions. [2023-12-15 21:24:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-12-15 21:24:09,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:09,576 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:09,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:09,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-15 21:24:09,783 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:09,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1819502093, now seen corresponding path program 1 times [2023-12-15 21:24:09,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:09,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107724863] [2023-12-15 21:24:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:09,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:09,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:09,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141367645] [2023-12-15 21:24:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:09,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:09,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:09,816 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:09,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-15 21:24:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:10,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 21:24:10,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4685 proven. 30 refuted. 0 times theorem prover too weak. 3865 trivial. 0 not checked. [2023-12-15 21:24:10,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 165 proven. 30 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:24:10,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:10,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107724863] [2023-12-15 21:24:10,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:10,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141367645] [2023-12-15 21:24:10,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141367645] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:10,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:10,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-15 21:24:10,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927209130] [2023-12-15 21:24:10,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 21:24:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 21:24:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:24:10,835 INFO L87 Difference]: Start difference. First operand 6479 states and 9766 transitions. Second operand has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 5 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) [2023-12-15 21:24:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:11,300 INFO L93 Difference]: Finished difference Result 11583 states and 17432 transitions. [2023-12-15 21:24:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:24:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 5 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) Word has length 475 [2023-12-15 21:24:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:11,308 INFO L225 Difference]: With dead ends: 11583 [2023-12-15 21:24:11,308 INFO L226 Difference]: Without dead ends: 5261 [2023-12-15 21:24:11,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-12-15 21:24:11,315 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1328 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:11,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 1079 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:24:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2023-12-15 21:24:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 4484. [2023-12-15 21:24:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4484 states, 3875 states have (on average 1.4583225806451612) internal successors, (5651), 3884 states have internal predecessors, (5651), 530 states have call successors, (530), 78 states have call predecessors, (530), 78 states have return successors, (530), 521 states have call predecessors, (530), 530 states have call successors, (530) [2023-12-15 21:24:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 6711 transitions. [2023-12-15 21:24:11,528 INFO L78 Accepts]: Start accepts. Automaton has 4484 states and 6711 transitions. Word has length 475 [2023-12-15 21:24:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:11,529 INFO L495 AbstractCegarLoop]: Abstraction has 4484 states and 6711 transitions. [2023-12-15 21:24:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 5 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) [2023-12-15 21:24:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4484 states and 6711 transitions. [2023-12-15 21:24:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-15 21:24:11,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:11,532 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:11,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:11,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-15 21:24:11,739 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:11,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash 874578460, now seen corresponding path program 1 times [2023-12-15 21:24:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941103077] [2023-12-15 21:24:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:11,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369368453] [2023-12-15 21:24:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:11,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:11,802 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:11,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-15 21:24:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:12,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:24:12,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 65 proven. 195 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-12-15 21:24:13,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-12-15 21:24:13,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941103077] [2023-12-15 21:24:13,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369368453] [2023-12-15 21:24:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369368453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:13,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:13,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-12-15 21:24:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517821071] [2023-12-15 21:24:13,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:13,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-15 21:24:13,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-15 21:24:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-12-15 21:24:13,496 INFO L87 Difference]: Start difference. First operand 4484 states and 6711 transitions. Second operand has 16 states, 15 states have (on average 13.666666666666666) internal successors, (205), 16 states have internal predecessors, (205), 4 states have call successors, (132), 3 states have call predecessors, (132), 4 states have return successors, (132), 2 states have call predecessors, (132), 4 states have call successors, (132) [2023-12-15 21:24:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:14,968 INFO L93 Difference]: Finished difference Result 19347 states and 29239 transitions. [2023-12-15 21:24:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 21:24:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 13.666666666666666) internal successors, (205), 16 states have internal predecessors, (205), 4 states have call successors, (132), 3 states have call predecessors, (132), 4 states have return successors, (132), 2 states have call predecessors, (132), 4 states have call successors, (132) Word has length 476 [2023-12-15 21:24:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:14,983 INFO L225 Difference]: With dead ends: 19347 [2023-12-15 21:24:14,983 INFO L226 Difference]: Without dead ends: 15018 [2023-12-15 21:24:14,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-12-15 21:24:14,987 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 3462 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3980 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:14,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3980 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 21:24:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15018 states. [2023-12-15 21:24:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15018 to 4491. [2023-12-15 21:24:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 3881 states have (on average 1.4576140170059264) internal successors, (5657), 3890 states have internal predecessors, (5657), 530 states have call successors, (530), 79 states have call predecessors, (530), 79 states have return successors, (530), 521 states have call predecessors, (530), 530 states have call successors, (530) [2023-12-15 21:24:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 6717 transitions. [2023-12-15 21:24:15,255 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 6717 transitions. Word has length 476 [2023-12-15 21:24:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:15,255 INFO L495 AbstractCegarLoop]: Abstraction has 4491 states and 6717 transitions. [2023-12-15 21:24:15,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 13.666666666666666) internal successors, (205), 16 states have internal predecessors, (205), 4 states have call successors, (132), 3 states have call predecessors, (132), 4 states have return successors, (132), 2 states have call predecessors, (132), 4 states have call successors, (132) [2023-12-15 21:24:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 6717 transitions. [2023-12-15 21:24:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-15 21:24:15,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:15,258 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:15,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-15 21:24:15,466 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:15,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1522892070, now seen corresponding path program 1 times [2023-12-15 21:24:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:15,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355753501] [2023-12-15 21:24:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:15,533 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:15,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460803776] [2023-12-15 21:24:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:15,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:15,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:15,537 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:15,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-15 21:24:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:15,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-15 21:24:15,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4315 proven. 501 refuted. 0 times theorem prover too weak. 3764 trivial. 0 not checked. [2023-12-15 21:24:18,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 69 proven. 318 refuted. 0 times theorem prover too weak. 8193 trivial. 0 not checked. [2023-12-15 21:24:20,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355753501] [2023-12-15 21:24:20,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460803776] [2023-12-15 21:24:20,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460803776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:20,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:20,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2023-12-15 21:24:20,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147836916] [2023-12-15 21:24:20,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:20,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 21:24:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 21:24:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2023-12-15 21:24:20,009 INFO L87 Difference]: Start difference. First operand 4491 states and 6717 transitions. Second operand has 29 states, 29 states have (on average 8.586206896551724) internal successors, (249), 28 states have internal predecessors, (249), 9 states have call successors, (132), 6 states have call predecessors, (132), 9 states have return successors, (132), 7 states have call predecessors, (132), 9 states have call successors, (132) [2023-12-15 21:24:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:24,228 INFO L93 Difference]: Finished difference Result 28060 states and 42449 transitions. [2023-12-15 21:24:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-15 21:24:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.586206896551724) internal successors, (249), 28 states have internal predecessors, (249), 9 states have call successors, (132), 6 states have call predecessors, (132), 9 states have return successors, (132), 7 states have call predecessors, (132), 9 states have call successors, (132) Word has length 476 [2023-12-15 21:24:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:24,310 INFO L225 Difference]: With dead ends: 28060 [2023-12-15 21:24:24,310 INFO L226 Difference]: Without dead ends: 23728 [2023-12-15 21:24:24,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 935 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1511, Invalid=4189, Unknown=0, NotChecked=0, Total=5700 [2023-12-15 21:24:24,316 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 7121 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7124 SdHoareTripleChecker+Valid, 5373 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:24,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7124 Valid, 5373 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 3775 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-15 21:24:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23728 states. [2023-12-15 21:24:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23728 to 10116. [2023-12-15 21:24:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10116 states, 9219 states have (on average 1.4736956285931229) internal successors, (13586), 9244 states have internal predecessors, (13586), 744 states have call successors, (744), 152 states have call predecessors, (744), 152 states have return successors, (744), 719 states have call predecessors, (744), 744 states have call successors, (744) [2023-12-15 21:24:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10116 states to 10116 states and 15074 transitions. [2023-12-15 21:24:24,807 INFO L78 Accepts]: Start accepts. Automaton has 10116 states and 15074 transitions. Word has length 476 [2023-12-15 21:24:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:24,808 INFO L495 AbstractCegarLoop]: Abstraction has 10116 states and 15074 transitions. [2023-12-15 21:24:24,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.586206896551724) internal successors, (249), 28 states have internal predecessors, (249), 9 states have call successors, (132), 6 states have call predecessors, (132), 9 states have return successors, (132), 7 states have call predecessors, (132), 9 states have call successors, (132) [2023-12-15 21:24:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10116 states and 15074 transitions. [2023-12-15 21:24:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-15 21:24:24,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:24,812 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:24,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:25,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-15 21:24:25,021 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:25,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1804724572, now seen corresponding path program 1 times [2023-12-15 21:24:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:25,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260001971] [2023-12-15 21:24:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:25,055 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:25,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346379683] [2023-12-15 21:24:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:25,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:25,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:25,056 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:25,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-15 21:24:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:25,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 21:24:25,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 5453 proven. 345 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2023-12-15 21:24:26,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 222 proven. 354 refuted. 0 times theorem prover too weak. 8004 trivial. 0 not checked. [2023-12-15 21:24:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260001971] [2023-12-15 21:24:26,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346379683] [2023-12-15 21:24:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346379683] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:26,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-12-15 21:24:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858119308] [2023-12-15 21:24:26,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:26,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 21:24:26,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 21:24:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-12-15 21:24:26,985 INFO L87 Difference]: Start difference. First operand 10116 states and 15074 transitions. Second operand has 24 states, 23 states have (on average 10.869565217391305) internal successors, (250), 22 states have internal predecessors, (250), 7 states have call successors, (111), 4 states have call predecessors, (111), 9 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-12-15 21:24:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:28,751 INFO L93 Difference]: Finished difference Result 19264 states and 28511 transitions. [2023-12-15 21:24:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-15 21:24:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 10.869565217391305) internal successors, (250), 22 states have internal predecessors, (250), 7 states have call successors, (111), 4 states have call predecessors, (111), 9 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) Word has length 476 [2023-12-15 21:24:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:28,764 INFO L225 Difference]: With dead ends: 19264 [2023-12-15 21:24:28,764 INFO L226 Difference]: Without dead ends: 10402 [2023-12-15 21:24:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 929 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=569, Invalid=1323, Unknown=0, NotChecked=0, Total=1892 [2023-12-15 21:24:28,771 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 2192 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2212 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:28,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2212 Valid, 2252 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 21:24:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2023-12-15 21:24:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 8166. [2023-12-15 21:24:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 7222 states have (on average 1.4516754361672666) internal successors, (10484), 7250 states have internal predecessors, (10484), 746 states have call successors, (746), 197 states have call predecessors, (746), 197 states have return successors, (746), 718 states have call predecessors, (746), 746 states have call successors, (746) [2023-12-15 21:24:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 11976 transitions. [2023-12-15 21:24:29,286 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 11976 transitions. Word has length 476 [2023-12-15 21:24:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:29,286 INFO L495 AbstractCegarLoop]: Abstraction has 8166 states and 11976 transitions. [2023-12-15 21:24:29,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 10.869565217391305) internal successors, (250), 22 states have internal predecessors, (250), 7 states have call successors, (111), 4 states have call predecessors, (111), 9 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-12-15 21:24:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 11976 transitions. [2023-12-15 21:24:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-15 21:24:29,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:29,315 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:29,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 Received shutdown request... [2023-12-15 21:24:29,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-15 21:24:29,516 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:29,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 228493020, now seen corresponding path program 1 times [2023-12-15 21:24:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081523589] [2023-12-15 21:24:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:29,528 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 21:24:29,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-15 21:24:29,544 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:24:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-15 21:24:29,545 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 477 with TraceHistMax 66,while AutomatonFreeRefinementEngine was Timeout during feasibility check between IpTcStrategyModuleSmtInterpolCraig [1081523589] and IpTcStrategyModuleZ3 [1583844772]. [2023-12-15 21:24:29,547 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:29,549 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:24:29,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:24:29 BoogieIcfgContainer [2023-12-15 21:24:29,550 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:24:29,550 INFO L158 Benchmark]: Toolchain (without parser) took 63363.56ms. Allocated memory was 292.6MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 236.8MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 53.7MB. Max. memory is 8.0GB. [2023-12-15 21:24:29,550 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 196.1MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:24:29,551 INFO L158 Benchmark]: CACSL2BoogieTranslator took 502.80ms. Allocated memory is still 292.6MB. Free memory was 236.8MB in the beginning and 199.6MB in the end (delta: 37.2MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2023-12-15 21:24:29,551 INFO L158 Benchmark]: Boogie Procedure Inliner took 156.25ms. Allocated memory is still 292.6MB. Free memory was 199.6MB in the beginning and 249.8MB in the end (delta: -50.2MB). Peak memory consumption was 33.1MB. Max. memory is 8.0GB. [2023-12-15 21:24:29,551 INFO L158 Benchmark]: Boogie Preprocessor took 147.70ms. Allocated memory is still 292.6MB. Free memory was 249.8MB in the beginning and 217.0MB in the end (delta: 32.8MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. [2023-12-15 21:24:29,551 INFO L158 Benchmark]: RCFGBuilder took 905.38ms. Allocated memory was 292.6MB in the beginning and 450.9MB in the end (delta: 158.3MB). Free memory was 217.0MB in the beginning and 397.2MB in the end (delta: -180.1MB). Peak memory consumption was 78.6MB. Max. memory is 8.0GB. [2023-12-15 21:24:29,551 INFO L158 Benchmark]: TraceAbstraction took 61647.48ms. Allocated memory was 450.9MB in the beginning and 1.4GB in the end (delta: 964.7MB). Free memory was 396.6MB in the beginning and 1.3GB in the end (delta: -910.5MB). Peak memory consumption was 54.2MB. Max. memory is 8.0GB. [2023-12-15 21:24:29,552 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 196.1MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 502.80ms. Allocated memory is still 292.6MB. Free memory was 236.8MB in the beginning and 199.6MB in the end (delta: 37.2MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 156.25ms. Allocated memory is still 292.6MB. Free memory was 199.6MB in the beginning and 249.8MB in the end (delta: -50.2MB). Peak memory consumption was 33.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 147.70ms. Allocated memory is still 292.6MB. Free memory was 249.8MB in the beginning and 217.0MB in the end (delta: 32.8MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. * RCFGBuilder took 905.38ms. Allocated memory was 292.6MB in the beginning and 450.9MB in the end (delta: 158.3MB). Free memory was 217.0MB in the beginning and 397.2MB in the end (delta: -180.1MB). Peak memory consumption was 78.6MB. Max. memory is 8.0GB. * TraceAbstraction took 61647.48ms. Allocated memory was 450.9MB in the beginning and 1.4GB in the end (delta: 964.7MB). Free memory was 396.6MB in the beginning and 1.3GB in the end (delta: -910.5MB). Peak memory consumption was 54.2MB. 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: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 477 with TraceHistMax 66,while AutomatonFreeRefinementEngine was Timeout during feasibility check between IpTcStrategyModuleSmtInterpolCraig [1081523589] and IpTcStrategyModuleZ3 [1583844772]. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 290 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 61.6s, OverallIterations: 30, TraceHistogramMax: 66, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 21.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41263 SdHoareTripleChecker+Valid, 13.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40890 mSDsluCounter, 63209 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 46516 mSDsCounter, 4581 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18392 IncrementalHoareTripleChecker+Invalid, 22973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4581 mSolverCounterUnsat, 16693 mSDtfsCounter, 18392 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18564 GetRequests, 18194 SyntacticMatches, 4 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10116occurred in iteration=28, InterpolantAutomatonStates: 335, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.7s AutomataMinimizationTime, 29 MinimizatonAttempts, 47466 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 14118 NumberOfCodeBlocks, 14118 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 18337 ConstructedInterpolants, 0 QuantifiedInterpolants, 66161 SizeOfPredicates, 107 NumberOfNonLiveVariables, 34801 ConjunctsInSsa, 205 ConjunctsInUnsatCore, 39 InterpolantComputations, 19 PerfectInterpolantSequences, 331980/334620 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