/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_fillercode_fillercodesize_ps-cn-500_file-4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 07:38:51,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 07:38:51,483 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 07:38:51,487 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 07:38:51,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 07:38:51,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 07:38:51,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 07:38:51,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 07:38:51,512 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 07:38:51,515 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 07:38:51,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 07:38:51,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 07:38:51,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 07:38:51,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 07:38:51,517 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 07:38:51,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 07:38:51,518 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 07:38:51,518 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 07:38:51,518 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 07:38:51,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 07:38:51,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 07:38:51,519 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 07:38:51,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 07:38:51,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 07:38:51,519 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 07:38:51,520 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 07:38:51,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 07:38:51,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 07:38:51,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 07:38:51,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 07:38:51,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 07:38:51,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 07:38:51,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 07:38:51,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 07:38:51,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 07:38:51,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 07:38:51,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 07:38:51,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 07:38:51,522 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 07:38:51,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 07:38:51,523 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 07:38:51,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 07:38:51,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 07:38:51,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 07:38:51,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 07:38:51,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 07:38:51,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 07:38:51,764 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 07:38:51,765 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 07:38:51,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-4.i [2023-12-19 07:38:52,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 07:38:53,168 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 07:38:53,168 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-4.i [2023-12-19 07:38:53,179 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d420e67ab/c8d4529a963c4223ba759b2044b4e26d/FLAG370b72223 [2023-12-19 07:38:53,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d420e67ab/c8d4529a963c4223ba759b2044b4e26d [2023-12-19 07:38:53,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 07:38:53,192 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 07:38:53,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 07:38:53,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 07:38:53,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 07:38:53,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9fbc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53, skipping insertion in model container [2023-12-19 07:38:53,205 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 07:38:53,379 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_fillercode_fillercodesize_ps-cn-500_file-4.i[915,928] [2023-12-19 07:38:53,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 07:38:53,565 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 07:38:53,573 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_fillercode_fillercodesize_ps-cn-500_file-4.i[915,928] [2023-12-19 07:38:53,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 07:38:53,657 INFO L206 MainTranslator]: Completed translation [2023-12-19 07:38:53,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53 WrapperNode [2023-12-19 07:38:53,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 07:38:53,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 07:38:53,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 07:38:53,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 07:38:53,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,750 INFO L138 Inliner]: procedures = 26, calls = 94, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 714 [2023-12-19 07:38:53,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 07:38:53,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 07:38:53,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 07:38:53,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 07:38:53,761 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,781 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,819 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]. [2023-12-19 07:38:53,820 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 07:38:53,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 07:38:53,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 07:38:53,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 07:38:53,890 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (1/1) ... [2023-12-19 07:38:53,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 07:38:53,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:38:53,912 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) [2023-12-19 07:38:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 07:38:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 07:38:53,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 07:38:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 07:38:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 07:38:53,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 07:38:53,932 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 [2023-12-19 07:38:54,063 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 07:38:54,065 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 07:38:54,820 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 07:38:54,851 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 07:38:54,851 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 07:38:54,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:38:54 BoogieIcfgContainer [2023-12-19 07:38:54,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 07:38:54,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 07:38:54,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 07:38:54,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 07:38:54,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 07:38:53" (1/3) ... [2023-12-19 07:38:54,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6686acfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:38:54, skipping insertion in model container [2023-12-19 07:38:54,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:38:53" (2/3) ... [2023-12-19 07:38:54,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6686acfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:38:54, skipping insertion in model container [2023-12-19 07:38:54,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:38:54" (3/3) ... [2023-12-19 07:38:54,858 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-4.i [2023-12-19 07:38:54,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 07:38:54,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 07:38:54,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 07:38:54,928 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;@bbfdd35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 07:38:54,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 07:38:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 274 states, 190 states have (on average 1.6631578947368422) internal successors, (316), 191 states have internal predecessors, (316), 81 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-12-19 07:38:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-12-19 07:38:54,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:38:54,958 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:38:54,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:38:54,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:38:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash 703475661, now seen corresponding path program 1 times [2023-12-19 07:38:54,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:38:54,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207969523] [2023-12-19 07:38:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:54,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:38:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:38:55,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:38:55,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207969523] [2023-12-19 07:38:55,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 07:38:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780053540] [2023-12-19 07:38:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:55,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:38:55,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:38:55,307 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) [2023-12-19 07:38:55,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 07:38:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:38:55,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 07:38:55,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:38:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2023-12-19 07:38:55,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:38:55,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780053540] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:38:55,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:38:55,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 07:38:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493791427] [2023-12-19 07:38:55,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:38:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 07:38:55,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:38:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 07:38:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 07:38:55,841 INFO L87 Difference]: Start difference. First operand has 274 states, 190 states have (on average 1.6631578947368422) internal successors, (316), 191 states have internal predecessors, (316), 81 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 2 states have call successors, (81) [2023-12-19 07:38:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:38:55,914 INFO L93 Difference]: Finished difference Result 544 states and 1033 transitions. [2023-12-19 07:38:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 07:38:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 2 states have call successors, (81) Word has length 544 [2023-12-19 07:38:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:38:55,929 INFO L225 Difference]: With dead ends: 544 [2023-12-19 07:38:55,929 INFO L226 Difference]: Without dead ends: 271 [2023-12-19 07:38:55,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 07:38:55,937 INFO L413 NwaCegarLoop]: 465 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, 465 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 [2023-12-19 07:38:55,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 465 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:38:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-12-19 07:38:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2023-12-19 07:38:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 188 states have (on average 1.627659574468085) internal successors, (306), 188 states have internal predecessors, (306), 81 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-12-19 07:38:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 468 transitions. [2023-12-19 07:38:56,028 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 468 transitions. Word has length 544 [2023-12-19 07:38:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:38:56,029 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 468 transitions. [2023-12-19 07:38:56,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 2 states have call successors, (81) [2023-12-19 07:38:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 468 transitions. [2023-12-19 07:38:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-12-19 07:38:56,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:38:56,043 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:38:56,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 07:38:56,256 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 [2023-12-19 07:38:56,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:38:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:38:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash 413499999, now seen corresponding path program 1 times [2023-12-19 07:38:56,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:38:56,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049244962] [2023-12-19 07:38:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:38:56,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:38:56,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326631183] [2023-12-19 07:38:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:38:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:38:56,403 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) [2023-12-19 07:38:56,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 07:38:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:38:56,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:38:56,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:38:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:38:56,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:38:56,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:38:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049244962] [2023-12-19 07:38:56,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:38:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326631183] [2023-12-19 07:38:56,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326631183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:38:56,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:38:56,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:38:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229378323] [2023-12-19 07:38:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:38:56,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:38:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:38:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:38:56,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:38:56,936 INFO L87 Difference]: Start difference. First operand 271 states and 468 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:38:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:38:57,010 INFO L93 Difference]: Finished difference Result 723 states and 1256 transitions. [2023-12-19 07:38:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:38:57,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 545 [2023-12-19 07:38:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:38:57,015 INFO L225 Difference]: With dead ends: 723 [2023-12-19 07:38:57,015 INFO L226 Difference]: Without dead ends: 453 [2023-12-19 07:38:57,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:38:57,017 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 320 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:38:57,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1217 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:38:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-12-19 07:38:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 450. [2023-12-19 07:38:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 335 states have (on average 1.6656716417910449) internal successors, (558), 336 states have internal predecessors, (558), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2023-12-19 07:38:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 782 transitions. [2023-12-19 07:38:57,061 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 782 transitions. Word has length 545 [2023-12-19 07:38:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:38:57,063 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 782 transitions. [2023-12-19 07:38:57,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:38:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 782 transitions. [2023-12-19 07:38:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-12-19 07:38:57,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:38:57,068 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:38:57,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 07:38:57,272 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 [2023-12-19 07:38:57,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:38:57,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:38:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2004404067, now seen corresponding path program 1 times [2023-12-19 07:38:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:38:57,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766217861] [2023-12-19 07:38:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:57,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:38:57,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:38:57,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358660608] [2023-12-19 07:38:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:38:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:38:57,368 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) [2023-12-19 07:38:57,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 07:38:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:38:57,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:38:57,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:38:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:38:57,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:38:57,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:38:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766217861] [2023-12-19 07:38:57,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:38:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358660608] [2023-12-19 07:38:57,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358660608] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:38:57,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:38:57,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:38:57,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231015132] [2023-12-19 07:38:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:38:57,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:38:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:38:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:38:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:38:57,680 INFO L87 Difference]: Start difference. First operand 450 states and 782 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:38:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:38:57,788 INFO L93 Difference]: Finished difference Result 1248 states and 2173 transitions. [2023-12-19 07:38:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:38:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 545 [2023-12-19 07:38:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:38:57,799 INFO L225 Difference]: With dead ends: 1248 [2023-12-19 07:38:57,799 INFO L226 Difference]: Without dead ends: 799 [2023-12-19 07:38:57,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:38:57,804 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 295 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:38:57,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 997 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:38:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-12-19 07:38:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 796. [2023-12-19 07:38:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 611 states have (on average 1.6595744680851063) internal successors, (1014), 614 states have internal predecessors, (1014), 180 states have call successors, (180), 4 states have call predecessors, (180), 4 states have return successors, (180), 177 states have call predecessors, (180), 180 states have call successors, (180) [2023-12-19 07:38:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1374 transitions. [2023-12-19 07:38:57,862 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1374 transitions. Word has length 545 [2023-12-19 07:38:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:38:57,863 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1374 transitions. [2023-12-19 07:38:57,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:38:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1374 transitions. [2023-12-19 07:38:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-12-19 07:38:57,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:38:57,869 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:38:57,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-19 07:38:58,078 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 [2023-12-19 07:38:58,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:38:58,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:38:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash -925054437, now seen corresponding path program 1 times [2023-12-19 07:38:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:38:58,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423040551] [2023-12-19 07:38:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:58,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:38:58,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:38:58,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375365501] [2023-12-19 07:38:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:58,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:38:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:38:58,139 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) [2023-12-19 07:38:58,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 07:38:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:38:58,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:38:58,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:38:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:38:58,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:38:58,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:38:58,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423040551] [2023-12-19 07:38:58,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:38:58,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375365501] [2023-12-19 07:38:58,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375365501] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:38:58,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:38:58,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:38:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118112084] [2023-12-19 07:38:58,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:38:58,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:38:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:38:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:38:58,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:38:58,570 INFO L87 Difference]: Start difference. First operand 796 states and 1374 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:38:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:38:58,633 INFO L93 Difference]: Finished difference Result 2362 states and 4074 transitions. [2023-12-19 07:38:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:38:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 545 [2023-12-19 07:38:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:38:58,643 INFO L225 Difference]: With dead ends: 2362 [2023-12-19 07:38:58,643 INFO L226 Difference]: Without dead ends: 1567 [2023-12-19 07:38:58,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:38:58,649 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 440 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:38:58,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 921 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:38:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2023-12-19 07:38:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 918. [2023-12-19 07:38:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 733 states have (on average 1.6971350613915417) internal successors, (1244), 736 states have internal predecessors, (1244), 180 states have call successors, (180), 4 states have call predecessors, (180), 4 states have return successors, (180), 177 states have call predecessors, (180), 180 states have call successors, (180) [2023-12-19 07:38:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1604 transitions. [2023-12-19 07:38:58,714 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1604 transitions. Word has length 545 [2023-12-19 07:38:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:38:58,715 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1604 transitions. [2023-12-19 07:38:58,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:38:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1604 transitions. [2023-12-19 07:38:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-12-19 07:38:58,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:38:58,720 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:38:58,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 07:38:58,932 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 [2023-12-19 07:38:58,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:38:58,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:38:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash 445880494, now seen corresponding path program 1 times [2023-12-19 07:38:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:38:58,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790106746] [2023-12-19 07:38:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:58,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:38:59,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:38:59,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517415564] [2023-12-19 07:38:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:38:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:38:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:38:59,017 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) [2023-12-19 07:38:59,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 07:38:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:38:59,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 07:38:59,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:38:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:38:59,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:38:59,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:38:59,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790106746] [2023-12-19 07:38:59,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:38:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517415564] [2023-12-19 07:38:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517415564] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:38:59,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:38:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:38:59,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23974785] [2023-12-19 07:38:59,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:38:59,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:38:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:38:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:38:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:38:59,782 INFO L87 Difference]: Start difference. First operand 918 states and 1604 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:00,146 INFO L93 Difference]: Finished difference Result 4132 states and 7180 transitions. [2023-12-19 07:39:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:39:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 546 [2023-12-19 07:39:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:00,168 INFO L225 Difference]: With dead ends: 4132 [2023-12-19 07:39:00,168 INFO L226 Difference]: Without dead ends: 3215 [2023-12-19 07:39:00,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:39:00,174 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 707 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:00,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1826 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 07:39:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2023-12-19 07:39:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3207. [2023-12-19 07:39:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 2540 states have (on average 1.6724409448818898) internal successors, (4248), 2554 states have internal predecessors, (4248), 650 states have call successors, (650), 16 states have call predecessors, (650), 16 states have return successors, (650), 636 states have call predecessors, (650), 650 states have call successors, (650) [2023-12-19 07:39:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 5548 transitions. [2023-12-19 07:39:00,409 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 5548 transitions. Word has length 546 [2023-12-19 07:39:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:00,411 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 5548 transitions. [2023-12-19 07:39:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 5548 transitions. [2023-12-19 07:39:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-12-19 07:39:00,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:00,421 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:00,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:00,630 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 [2023-12-19 07:39:00,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:00,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1940629012, now seen corresponding path program 1 times [2023-12-19 07:39:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:00,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242499859] [2023-12-19 07:39:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:00,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:00,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:00,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088325239] [2023-12-19 07:39:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:00,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:00,676 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) [2023-12-19 07:39:00,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 07:39:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:01,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 07:39:01,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:01,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:01,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242499859] [2023-12-19 07:39:01,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088325239] [2023-12-19 07:39:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088325239] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:01,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:39:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68053255] [2023-12-19 07:39:01,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:39:01,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:39:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:39:01,591 INFO L87 Difference]: Start difference. First operand 3207 states and 5548 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:01,935 INFO L93 Difference]: Finished difference Result 6437 states and 11113 transitions. [2023-12-19 07:39:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 07:39:01,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 546 [2023-12-19 07:39:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:01,948 INFO L225 Difference]: With dead ends: 6437 [2023-12-19 07:39:01,949 INFO L226 Difference]: Without dead ends: 3231 [2023-12-19 07:39:01,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:39:01,959 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 532 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:01,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1451 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 07:39:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2023-12-19 07:39:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 2623. [2023-12-19 07:39:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2080 states have (on average 1.6706730769230769) internal successors, (3475), 2090 states have internal predecessors, (3475), 526 states have call successors, (526), 16 states have call predecessors, (526), 16 states have return successors, (526), 516 states have call predecessors, (526), 526 states have call successors, (526) [2023-12-19 07:39:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 4527 transitions. [2023-12-19 07:39:02,071 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 4527 transitions. Word has length 546 [2023-12-19 07:39:02,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:02,072 INFO L495 AbstractCegarLoop]: Abstraction has 2623 states and 4527 transitions. [2023-12-19 07:39:02,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 4527 transitions. [2023-12-19 07:39:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-12-19 07:39:02,077 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:02,077 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:02,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:02,285 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 [2023-12-19 07:39:02,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:02,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash 20945646, now seen corresponding path program 1 times [2023-12-19 07:39:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839929106] [2023-12-19 07:39:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:02,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310865494] [2023-12-19 07:39:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:02,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:02,352 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) [2023-12-19 07:39:02,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 07:39:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:02,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 07:39:02,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:02,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:02,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839929106] [2023-12-19 07:39:02,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310865494] [2023-12-19 07:39:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310865494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:02,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:39:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030225942] [2023-12-19 07:39:02,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:39:02,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:39:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:39:02,710 INFO L87 Difference]: Start difference. First operand 2623 states and 4527 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, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:03,289 INFO L93 Difference]: Finished difference Result 10099 states and 17059 transitions. [2023-12-19 07:39:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:39:03,290 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, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 546 [2023-12-19 07:39:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:03,323 INFO L225 Difference]: With dead ends: 10099 [2023-12-19 07:39:03,325 INFO L226 Difference]: Without dead ends: 7477 [2023-12-19 07:39:03,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:39:03,336 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 758 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:03,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1250 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 07:39:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2023-12-19 07:39:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 4159. [2023-12-19 07:39:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4159 states, 3172 states have (on average 1.5778688524590163) internal successors, (5005), 3194 states have internal predecessors, (5005), 954 states have call successors, (954), 32 states have call predecessors, (954), 32 states have return successors, (954), 932 states have call predecessors, (954), 954 states have call successors, (954) [2023-12-19 07:39:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4159 states to 4159 states and 6913 transitions. [2023-12-19 07:39:03,648 INFO L78 Accepts]: Start accepts. Automaton has 4159 states and 6913 transitions. Word has length 546 [2023-12-19 07:39:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:03,649 INFO L495 AbstractCegarLoop]: Abstraction has 4159 states and 6913 transitions. [2023-12-19 07:39:03,649 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, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4159 states and 6913 transitions. [2023-12-19 07:39:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-12-19 07:39:03,655 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:03,655 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:03,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:03,864 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 [2023-12-19 07:39:03,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:03,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1527449486, now seen corresponding path program 1 times [2023-12-19 07:39:03,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:03,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024748369] [2023-12-19 07:39:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:03,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:03,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492563673] [2023-12-19 07:39:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:03,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:03,933 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) [2023-12-19 07:39:03,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 07:39:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:04,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 07:39:04,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:04,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:04,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:04,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024748369] [2023-12-19 07:39:04,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:04,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492563673] [2023-12-19 07:39:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492563673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:04,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:04,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:39:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559294420] [2023-12-19 07:39:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:39:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:39:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:39:04,314 INFO L87 Difference]: Start difference. First operand 4159 states and 6913 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, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:04,958 INFO L93 Difference]: Finished difference Result 14221 states and 23518 transitions. [2023-12-19 07:39:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:39:04,958 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, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 546 [2023-12-19 07:39:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:04,998 INFO L225 Difference]: With dead ends: 14221 [2023-12-19 07:39:04,999 INFO L226 Difference]: Without dead ends: 10063 [2023-12-19 07:39:05,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:39:05,014 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 986 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:05,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1719 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 07:39:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10063 states. [2023-12-19 07:39:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10063 to 4085. [2023-12-19 07:39:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3346 states have (on average 1.658696951583981) internal successors, (5550), 3360 states have internal predecessors, (5550), 706 states have call successors, (706), 32 states have call predecessors, (706), 32 states have return successors, (706), 692 states have call predecessors, (706), 706 states have call successors, (706) [2023-12-19 07:39:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6962 transitions. [2023-12-19 07:39:05,392 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6962 transitions. Word has length 546 [2023-12-19 07:39:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:05,392 INFO L495 AbstractCegarLoop]: Abstraction has 4085 states and 6962 transitions. [2023-12-19 07:39:05,393 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, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6962 transitions. [2023-12-19 07:39:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-12-19 07:39:05,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:05,400 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:05,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:05,608 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 [2023-12-19 07:39:05,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:05,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1686608, now seen corresponding path program 1 times [2023-12-19 07:39:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:05,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261042972] [2023-12-19 07:39:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:05,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:05,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360597446] [2023-12-19 07:39:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:05,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:05,693 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) [2023-12-19 07:39:05,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 07:39:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:05,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:05,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6518 proven. 129 refuted. 0 times theorem prover too weak. 6313 trivial. 0 not checked. [2023-12-19 07:39:06,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 111 proven. 129 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:06,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:06,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261042972] [2023-12-19 07:39:06,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:06,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360597446] [2023-12-19 07:39:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360597446] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:06,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 07:39:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237803098] [2023-12-19 07:39:06,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 07:39:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 07:39:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:39:06,555 INFO L87 Difference]: Start difference. First operand 4085 states and 6962 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, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-19 07:39:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:07,004 INFO L93 Difference]: Finished difference Result 6353 states and 10829 transitions. [2023-12-19 07:39:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:39:07,005 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, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 546 [2023-12-19 07:39:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:07,019 INFO L225 Difference]: With dead ends: 6353 [2023-12-19 07:39:07,019 INFO L226 Difference]: Without dead ends: 2269 [2023-12-19 07:39:07,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 1084 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 07:39:07,032 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 306 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:07,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 924 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:39:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2023-12-19 07:39:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2237. [2023-12-19 07:39:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 1802 states have (on average 1.6270810210876803) internal successors, (2932), 1808 states have internal predecessors, (2932), 410 states have call successors, (410), 24 states have call predecessors, (410), 24 states have return successors, (410), 404 states have call predecessors, (410), 410 states have call successors, (410) [2023-12-19 07:39:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3752 transitions. [2023-12-19 07:39:07,173 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3752 transitions. Word has length 546 [2023-12-19 07:39:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:07,173 INFO L495 AbstractCegarLoop]: Abstraction has 2237 states and 3752 transitions. [2023-12-19 07:39:07,174 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, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-19 07:39:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3752 transitions. [2023-12-19 07:39:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-12-19 07:39:07,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:07,179 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:07,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-19 07:39:07,388 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 [2023-12-19 07:39:07,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash -519893359, now seen corresponding path program 1 times [2023-12-19 07:39:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797711483] [2023-12-19 07:39:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:07,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:07,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:07,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949564229] [2023-12-19 07:39:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:07,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:07,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:07,430 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) [2023-12-19 07:39:07,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 07:39:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:07,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 07:39:07,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:07,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797711483] [2023-12-19 07:39:07,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949564229] [2023-12-19 07:39:07,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949564229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:07,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 07:39:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782506022] [2023-12-19 07:39:07,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 07:39:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 07:39:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-19 07:39:07,894 INFO L87 Difference]: Start difference. First operand 2237 states and 3752 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:09,081 INFO L93 Difference]: Finished difference Result 12459 states and 20952 transitions. [2023-12-19 07:39:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 07:39:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 550 [2023-12-19 07:39:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:09,105 INFO L225 Difference]: With dead ends: 12459 [2023-12-19 07:39:09,105 INFO L226 Difference]: Without dead ends: 9471 [2023-12-19 07:39:09,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-12-19 07:39:09,112 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 2292 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:09,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2292 Valid, 2517 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 07:39:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9471 states. [2023-12-19 07:39:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9471 to 3898. [2023-12-19 07:39:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3455 states have (on average 1.7007235890014472) internal successors, (5876), 3461 states have internal predecessors, (5876), 410 states have call successors, (410), 32 states have call predecessors, (410), 32 states have return successors, (410), 404 states have call predecessors, (410), 410 states have call successors, (410) [2023-12-19 07:39:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 6696 transitions. [2023-12-19 07:39:09,373 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 6696 transitions. Word has length 550 [2023-12-19 07:39:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:09,373 INFO L495 AbstractCegarLoop]: Abstraction has 3898 states and 6696 transitions. [2023-12-19 07:39:09,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:09,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 6696 transitions. [2023-12-19 07:39:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-12-19 07:39:09,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:09,381 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:09,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:09,590 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 [2023-12-19 07:39:09,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:09,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 949868051, now seen corresponding path program 1 times [2023-12-19 07:39:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:09,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166423667] [2023-12-19 07:39:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:09,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446240457] [2023-12-19 07:39:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:09,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:09,631 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) [2023-12-19 07:39:09,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 07:39:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:09,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:09,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6428 proven. 102 refuted. 0 times theorem prover too weak. 6430 trivial. 0 not checked. [2023-12-19 07:39:10,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 138 proven. 102 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:10,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:10,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166423667] [2023-12-19 07:39:10,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:10,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446240457] [2023-12-19 07:39:10,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446240457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:10,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:10,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 07:39:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817060192] [2023-12-19 07:39:10,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:10,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 07:39:10,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 07:39:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 07:39:10,476 INFO L87 Difference]: Start difference. First operand 3898 states and 6696 transitions. Second operand has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) [2023-12-19 07:39:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:10,967 INFO L93 Difference]: Finished difference Result 6331 states and 10907 transitions. [2023-12-19 07:39:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:39:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) Word has length 550 [2023-12-19 07:39:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:10,976 INFO L225 Difference]: With dead ends: 6331 [2023-12-19 07:39:10,976 INFO L226 Difference]: Without dead ends: 2275 [2023-12-19 07:39:10,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1102 GetRequests, 1092 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 07:39:10,983 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 502 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:10,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 887 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:39:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2023-12-19 07:39:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 2255. [2023-12-19 07:39:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 1996 states have (on average 1.6833667334669338) internal successors, (3360), 1998 states have internal predecessors, (3360), 240 states have call successors, (240), 18 states have call predecessors, (240), 18 states have return successors, (240), 238 states have call predecessors, (240), 240 states have call successors, (240) [2023-12-19 07:39:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 3840 transitions. [2023-12-19 07:39:11,090 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 3840 transitions. Word has length 550 [2023-12-19 07:39:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:11,090 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 3840 transitions. [2023-12-19 07:39:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) [2023-12-19 07:39:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 3840 transitions. [2023-12-19 07:39:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-12-19 07:39:11,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:11,097 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:11,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:11,340 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 [2023-12-19 07:39:11,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:11,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash 514674252, now seen corresponding path program 1 times [2023-12-19 07:39:11,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:11,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745228243] [2023-12-19 07:39:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:11,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:11,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56213784] [2023-12-19 07:39:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:11,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:11,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:11,377 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) [2023-12-19 07:39:11,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 07:39:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:11,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:11,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 4110 proven. 45 refuted. 0 times theorem prover too weak. 8805 trivial. 0 not checked. [2023-12-19 07:39:11,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 195 proven. 45 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:12,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745228243] [2023-12-19 07:39:12,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56213784] [2023-12-19 07:39:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56213784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:12,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:12,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 07:39:12,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566017584] [2023-12-19 07:39:12,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:12,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 07:39:12,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 07:39:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:39:12,109 INFO L87 Difference]: Start difference. First operand 2255 states and 3840 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2023-12-19 07:39:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:12,535 INFO L93 Difference]: Finished difference Result 4537 states and 7705 transitions. [2023-12-19 07:39:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:39:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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 551 [2023-12-19 07:39:12,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:12,543 INFO L225 Difference]: With dead ends: 4537 [2023-12-19 07:39:12,543 INFO L226 Difference]: Without dead ends: 2283 [2023-12-19 07:39:12,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 07:39:12,548 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 483 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:12,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 936 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:39:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2023-12-19 07:39:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2263. [2023-12-19 07:39:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2002 states have (on average 1.6773226773226773) internal successors, (3358), 2004 states have internal predecessors, (3358), 240 states have call successors, (240), 20 states have call predecessors, (240), 20 states have return successors, (240), 238 states have call predecessors, (240), 240 states have call successors, (240) [2023-12-19 07:39:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3838 transitions. [2023-12-19 07:39:12,636 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3838 transitions. Word has length 551 [2023-12-19 07:39:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:12,636 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 3838 transitions. [2023-12-19 07:39:12,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2023-12-19 07:39:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3838 transitions. [2023-12-19 07:39:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-12-19 07:39:12,642 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:12,642 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:12,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:12,850 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 [2023-12-19 07:39:12,851 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:12,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1974854710, now seen corresponding path program 1 times [2023-12-19 07:39:12,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:12,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185415395] [2023-12-19 07:39:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:12,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:12,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:12,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220799034] [2023-12-19 07:39:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:12,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:12,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:12,911 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) [2023-12-19 07:39:12,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 07:39:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:13,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:13,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 3698 proven. 39 refuted. 0 times theorem prover too weak. 9223 trivial. 0 not checked. [2023-12-19 07:39:13,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 201 proven. 39 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:13,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:13,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185415395] [2023-12-19 07:39:13,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:13,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220799034] [2023-12-19 07:39:13,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220799034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:13,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:13,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 07:39:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838393636] [2023-12-19 07:39:13,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:13,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 07:39:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 07:39:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:39:13,691 INFO L87 Difference]: Start difference. First operand 2263 states and 3838 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-12-19 07:39:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:14,115 INFO L93 Difference]: Finished difference Result 4553 states and 7701 transitions. [2023-12-19 07:39:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:39:14,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 551 [2023-12-19 07:39:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:14,121 INFO L225 Difference]: With dead ends: 4553 [2023-12-19 07:39:14,121 INFO L226 Difference]: Without dead ends: 2291 [2023-12-19 07:39:14,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 07:39:14,125 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 513 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:14,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 931 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:39:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-12-19 07:39:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2271. [2023-12-19 07:39:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2008 states have (on average 1.655378486055777) internal successors, (3324), 2010 states have internal predecessors, (3324), 240 states have call successors, (240), 22 states have call predecessors, (240), 22 states have return successors, (240), 238 states have call predecessors, (240), 240 states have call successors, (240) [2023-12-19 07:39:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 3804 transitions. [2023-12-19 07:39:14,210 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 3804 transitions. Word has length 551 [2023-12-19 07:39:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:14,211 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 3804 transitions. [2023-12-19 07:39:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-12-19 07:39:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 3804 transitions. [2023-12-19 07:39:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-12-19 07:39:14,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:14,217 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:14,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:14,425 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 [2023-12-19 07:39:14,426 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:14,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash 977146148, now seen corresponding path program 1 times [2023-12-19 07:39:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332558605] [2023-12-19 07:39:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:14,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:14,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670376207] [2023-12-19 07:39:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:14,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:14,465 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) [2023-12-19 07:39:14,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 07:39:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:14,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:14,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6560 proven. 120 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2023-12-19 07:39:15,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332558605] [2023-12-19 07:39:15,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670376207] [2023-12-19 07:39:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670376207] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:15,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:15,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 07:39:15,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770136407] [2023-12-19 07:39:15,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:15,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 07:39:15,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 07:39:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:39:15,390 INFO L87 Difference]: Start difference. First operand 2271 states and 3804 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-12-19 07:39:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:15,821 INFO L93 Difference]: Finished difference Result 4299 states and 7147 transitions. [2023-12-19 07:39:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 07:39:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 552 [2023-12-19 07:39:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:15,826 INFO L225 Difference]: With dead ends: 4299 [2023-12-19 07:39:15,826 INFO L226 Difference]: Without dead ends: 1787 [2023-12-19 07:39:15,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1096 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 07:39:15,829 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 240 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:15,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 892 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:39:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2023-12-19 07:39:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1363. [2023-12-19 07:39:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1098 states have (on average 1.5500910746812386) internal successors, (1702), 1100 states have internal predecessors, (1702), 240 states have call successors, (240), 24 states have call predecessors, (240), 24 states have return successors, (240), 238 states have call predecessors, (240), 240 states have call successors, (240) [2023-12-19 07:39:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2182 transitions. [2023-12-19 07:39:15,909 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2182 transitions. Word has length 552 [2023-12-19 07:39:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:15,909 INFO L495 AbstractCegarLoop]: Abstraction has 1363 states and 2182 transitions. [2023-12-19 07:39:15,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-12-19 07:39:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2182 transitions. [2023-12-19 07:39:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-12-19 07:39:15,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:15,914 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:15,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:16,122 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 [2023-12-19 07:39:16,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:16,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1535923349, now seen corresponding path program 1 times [2023-12-19 07:39:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097581487] [2023-12-19 07:39:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:16,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:16,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56503855] [2023-12-19 07:39:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:16,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:16,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:16,164 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) [2023-12-19 07:39:16,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 07:39:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:16,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 07:39:16,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:17,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:17,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:17,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097581487] [2023-12-19 07:39:17,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:17,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56503855] [2023-12-19 07:39:17,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56503855] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:17,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:17,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 07:39:17,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534409485] [2023-12-19 07:39:17,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:17,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 07:39:17,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 07:39:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:39:17,084 INFO L87 Difference]: Start difference. First operand 1363 states and 2182 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:18,385 INFO L93 Difference]: Finished difference Result 6065 states and 9614 transitions. [2023-12-19 07:39:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 07:39:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 553 [2023-12-19 07:39:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:18,395 INFO L225 Difference]: With dead ends: 6065 [2023-12-19 07:39:18,395 INFO L226 Difference]: Without dead ends: 4703 [2023-12-19 07:39:18,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-12-19 07:39:18,398 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1437 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:18,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 2088 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 07:39:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2023-12-19 07:39:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 2731. [2023-12-19 07:39:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2200 states have (on average 1.5454545454545454) internal successors, (3400), 2204 states have internal predecessors, (3400), 480 states have call successors, (480), 50 states have call predecessors, (480), 50 states have return successors, (480), 476 states have call predecessors, (480), 480 states have call successors, (480) [2023-12-19 07:39:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4360 transitions. [2023-12-19 07:39:18,590 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4360 transitions. Word has length 553 [2023-12-19 07:39:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:18,591 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 4360 transitions. [2023-12-19 07:39:18,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4360 transitions. [2023-12-19 07:39:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-12-19 07:39:18,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:18,596 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:18,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:18,804 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 [2023-12-19 07:39:18,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:18,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1261163735, now seen corresponding path program 1 times [2023-12-19 07:39:18,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:18,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017922774] [2023-12-19 07:39:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:18,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:18,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:18,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036880055] [2023-12-19 07:39:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:18,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:18,846 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) [2023-12-19 07:39:18,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 07:39:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:19,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:19,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:19,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:19,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017922774] [2023-12-19 07:39:19,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036880055] [2023-12-19 07:39:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036880055] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:19,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:39:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786707027] [2023-12-19 07:39:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:39:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:39:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:39:19,661 INFO L87 Difference]: Start difference. First operand 2731 states and 4360 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:19,985 INFO L93 Difference]: Finished difference Result 5463 states and 8720 transitions. [2023-12-19 07:39:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 07:39:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 553 [2023-12-19 07:39:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:19,994 INFO L225 Difference]: With dead ends: 5463 [2023-12-19 07:39:19,994 INFO L226 Difference]: Without dead ends: 2733 [2023-12-19 07:39:19,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:39:19,999 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 891 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:19,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 888 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 07:39:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2023-12-19 07:39:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2731. [2023-12-19 07:39:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2200 states have (on average 1.5418181818181818) internal successors, (3392), 2204 states have internal predecessors, (3392), 480 states have call successors, (480), 50 states have call predecessors, (480), 50 states have return successors, (480), 476 states have call predecessors, (480), 480 states have call successors, (480) [2023-12-19 07:39:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4352 transitions. [2023-12-19 07:39:20,178 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4352 transitions. Word has length 553 [2023-12-19 07:39:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:20,179 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 4352 transitions. [2023-12-19 07:39:20,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4352 transitions. [2023-12-19 07:39:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-12-19 07:39:20,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:20,184 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:20,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:20,392 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 [2023-12-19 07:39:20,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:20,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1445455659, now seen corresponding path program 1 times [2023-12-19 07:39:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:20,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801466793] [2023-12-19 07:39:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:20,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:20,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548349011] [2023-12-19 07:39:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:20,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:20,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:20,431 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) [2023-12-19 07:39:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 07:39:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:20,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 07:39:20,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 398 proven. 237 refuted. 0 times theorem prover too weak. 12325 trivial. 0 not checked. [2023-12-19 07:39:21,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 3 proven. 237 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:21,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801466793] [2023-12-19 07:39:21,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:21,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548349011] [2023-12-19 07:39:21,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548349011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:21,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:21,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-19 07:39:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091730749] [2023-12-19 07:39:21,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 07:39:21,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 07:39:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-19 07:39:21,681 INFO L87 Difference]: Start difference. First operand 2731 states and 4352 transitions. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 2 states have call successors, (160), 2 states have call predecessors, (160), 4 states have return successors, (161), 2 states have call predecessors, (161), 2 states have call successors, (161) [2023-12-19 07:39:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:22,834 INFO L93 Difference]: Finished difference Result 8375 states and 13214 transitions. [2023-12-19 07:39:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 07:39:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 2 states have call successors, (160), 2 states have call predecessors, (160), 4 states have return successors, (161), 2 states have call predecessors, (161), 2 states have call successors, (161) Word has length 553 [2023-12-19 07:39:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:22,849 INFO L225 Difference]: With dead ends: 8375 [2023-12-19 07:39:22,849 INFO L226 Difference]: Without dead ends: 5645 [2023-12-19 07:39:22,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1095 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-12-19 07:39:22,857 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 624 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 2852 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:22,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 2852 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 07:39:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2023-12-19 07:39:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5515. [2023-12-19 07:39:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 4438 states have (on average 1.5317710680486705) internal successors, (6798), 4446 states have internal predecessors, (6798), 960 states have call successors, (960), 116 states have call predecessors, (960), 116 states have return successors, (960), 952 states have call predecessors, (960), 960 states have call successors, (960) [2023-12-19 07:39:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 8718 transitions. [2023-12-19 07:39:23,268 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 8718 transitions. Word has length 553 [2023-12-19 07:39:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:23,269 INFO L495 AbstractCegarLoop]: Abstraction has 5515 states and 8718 transitions. [2023-12-19 07:39:23,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 2 states have call successors, (160), 2 states have call predecessors, (160), 4 states have return successors, (161), 2 states have call predecessors, (161), 2 states have call successors, (161) [2023-12-19 07:39:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 8718 transitions. [2023-12-19 07:39:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-12-19 07:39:23,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:23,274 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:23,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:23,484 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 [2023-12-19 07:39:23,485 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:23,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1445515241, now seen corresponding path program 1 times [2023-12-19 07:39:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:23,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750222078] [2023-12-19 07:39:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:23,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720446959] [2023-12-19 07:39:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:23,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:23,523 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) [2023-12-19 07:39:23,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 07:39:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:23,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 07:39:23,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6350 proven. 141 refuted. 0 times theorem prover too weak. 6469 trivial. 0 not checked. [2023-12-19 07:39:24,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 99 proven. 141 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:26,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750222078] [2023-12-19 07:39:26,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720446959] [2023-12-19 07:39:26,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720446959] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:26,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:26,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-19 07:39:26,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104001941] [2023-12-19 07:39:26,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:26,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 07:39:26,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 07:39:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2023-12-19 07:39:26,478 INFO L87 Difference]: Start difference. First operand 5515 states and 8718 transitions. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 3 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 3 states have call predecessors, (129), 3 states have call successors, (129) [2023-12-19 07:39:31,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 07:39:35,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 07:39:39,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 07:39:43,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 07:39:47,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 07:39:51,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 07:39:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:52,355 INFO L93 Difference]: Finished difference Result 16831 states and 26312 transitions. [2023-12-19 07:39:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 07:39:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 3 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 3 states have call predecessors, (129), 3 states have call successors, (129) Word has length 553 [2023-12-19 07:39:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:52,381 INFO L225 Difference]: With dead ends: 16831 [2023-12-19 07:39:52,381 INFO L226 Difference]: Without dead ends: 11317 [2023-12-19 07:39:52,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 1097 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=255, Unknown=1, NotChecked=0, Total=380 [2023-12-19 07:39:52,394 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 1716 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 368 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:52,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 2125 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1086 Invalid, 6 Unknown, 0 Unchecked, 25.0s Time] [2023-12-19 07:39:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11317 states. [2023-12-19 07:39:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11317 to 7139. [2023-12-19 07:39:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7139 states, 6046 states have (on average 1.5914654316903738) internal successors, (9622), 6054 states have internal predecessors, (9622), 960 states have call successors, (960), 132 states have call predecessors, (960), 132 states have return successors, (960), 952 states have call predecessors, (960), 960 states have call successors, (960) [2023-12-19 07:39:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7139 states to 7139 states and 11542 transitions. [2023-12-19 07:39:52,954 INFO L78 Accepts]: Start accepts. Automaton has 7139 states and 11542 transitions. Word has length 553 [2023-12-19 07:39:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:52,955 INFO L495 AbstractCegarLoop]: Abstraction has 7139 states and 11542 transitions. [2023-12-19 07:39:52,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 3 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 3 states have call predecessors, (129), 3 states have call successors, (129) [2023-12-19 07:39:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7139 states and 11542 transitions. [2023-12-19 07:39:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-12-19 07:39:52,960 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:52,960 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:52,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:53,172 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 [2023-12-19 07:39:53,173 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:53,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 674781675, now seen corresponding path program 1 times [2023-12-19 07:39:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:53,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984850597] [2023-12-19 07:39:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:53,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:53,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528899050] [2023-12-19 07:39:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:53,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:53,213 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) [2023-12-19 07:39:53,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 07:39:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:53,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:39:53,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:39:53,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:39:53,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:53,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984850597] [2023-12-19 07:39:53,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:53,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528899050] [2023-12-19 07:39:53,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528899050] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:39:53,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:39:53,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 07:39:53,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239936560] [2023-12-19 07:39:53,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:39:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 07:39:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 07:39:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 07:39:53,804 INFO L87 Difference]: Start difference. First operand 7139 states and 11542 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:39:56,049 INFO L93 Difference]: Finished difference Result 30267 states and 48478 transitions. [2023-12-19 07:39:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 07:39:56,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 553 [2023-12-19 07:39:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:39:56,091 INFO L225 Difference]: With dead ends: 30267 [2023-12-19 07:39:56,091 INFO L226 Difference]: Without dead ends: 23129 [2023-12-19 07:39:56,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:39:56,106 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 1310 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 07:39:56,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 2039 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 07:39:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23129 states. [2023-12-19 07:39:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23129 to 15067. [2023-12-19 07:39:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15067 states, 13126 states have (on average 1.6192290111229621) internal successors, (21254), 13150 states have internal predecessors, (21254), 1696 states have call successors, (1696), 244 states have call predecessors, (1696), 244 states have return successors, (1696), 1672 states have call predecessors, (1696), 1696 states have call successors, (1696) [2023-12-19 07:39:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15067 states to 15067 states and 24646 transitions. [2023-12-19 07:39:57,212 INFO L78 Accepts]: Start accepts. Automaton has 15067 states and 24646 transitions. Word has length 553 [2023-12-19 07:39:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:39:57,213 INFO L495 AbstractCegarLoop]: Abstraction has 15067 states and 24646 transitions. [2023-12-19 07:39:57,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:39:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 15067 states and 24646 transitions. [2023-12-19 07:39:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-12-19 07:39:57,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:39:57,222 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:39:57,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 07:39:57,428 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 [2023-12-19 07:39:57,429 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:39:57,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:39:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash 922928169, now seen corresponding path program 1 times [2023-12-19 07:39:57,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:39:57,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950732735] [2023-12-19 07:39:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:57,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:39:57,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:39:57,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632130249] [2023-12-19 07:39:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:39:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:39:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:39:57,462 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) [2023-12-19 07:39:57,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 07:39:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:39:57,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 07:39:57,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:39:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 398 proven. 237 refuted. 0 times theorem prover too weak. 12325 trivial. 0 not checked. [2023-12-19 07:39:59,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:39:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 3 proven. 237 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:39:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:39:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950732735] [2023-12-19 07:39:59,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:39:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632130249] [2023-12-19 07:39:59,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632130249] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:39:59,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:39:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-19 07:39:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245117283] [2023-12-19 07:39:59,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:39:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 07:39:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:39:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 07:39:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-19 07:39:59,871 INFO L87 Difference]: Start difference. First operand 15067 states and 24646 transitions. Second operand has 13 states, 13 states have (on average 22.076923076923077) internal successors, (287), 13 states have internal predecessors, (287), 4 states have call successors, (162), 3 states have call predecessors, (162), 5 states have return successors, (162), 4 states have call predecessors, (162), 4 states have call successors, (162) [2023-12-19 07:40:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:40:02,295 INFO L93 Difference]: Finished difference Result 39129 states and 63709 transitions. [2023-12-19 07:40:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 07:40:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 22.076923076923077) internal successors, (287), 13 states have internal predecessors, (287), 4 states have call successors, (162), 3 states have call predecessors, (162), 5 states have return successors, (162), 4 states have call predecessors, (162), 4 states have call successors, (162) Word has length 553 [2023-12-19 07:40:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:40:02,336 INFO L225 Difference]: With dead ends: 39129 [2023-12-19 07:40:02,396 INFO L226 Difference]: Without dead ends: 23727 [2023-12-19 07:40:02,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1095 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=389, Invalid=801, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 07:40:02,413 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 3236 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3240 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:40:02,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3240 Valid, 2793 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 07:40:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23727 states. [2023-12-19 07:40:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23727 to 16365. [2023-12-19 07:40:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16365 states, 14902 states have (on average 1.6329351764863778) internal successors, (24334), 14920 states have internal predecessors, (24334), 1272 states have call successors, (1272), 190 states have call predecessors, (1272), 190 states have return successors, (1272), 1254 states have call predecessors, (1272), 1272 states have call successors, (1272) [2023-12-19 07:40:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16365 states to 16365 states and 26878 transitions. [2023-12-19 07:40:03,242 INFO L78 Accepts]: Start accepts. Automaton has 16365 states and 26878 transitions. Word has length 553 [2023-12-19 07:40:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:40:03,242 INFO L495 AbstractCegarLoop]: Abstraction has 16365 states and 26878 transitions. [2023-12-19 07:40:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.076923076923077) internal successors, (287), 13 states have internal predecessors, (287), 4 states have call successors, (162), 3 states have call predecessors, (162), 5 states have return successors, (162), 4 states have call predecessors, (162), 4 states have call successors, (162) [2023-12-19 07:40:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 16365 states and 26878 transitions. [2023-12-19 07:40:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:40:03,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:40:03,251 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:40:03,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 07:40:03,455 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 [2023-12-19 07:40:03,455 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:40:03,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:40:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -452705379, now seen corresponding path program 1 times [2023-12-19 07:40:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:40:03,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374603394] [2023-12-19 07:40:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:40:03,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:40:03,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258068230] [2023-12-19 07:40:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:03,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:40:03,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:40:03,501 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) [2023-12-19 07:40:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 07:40:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:40:03,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 07:40:03,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:40:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:40:04,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:40:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:40:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374603394] [2023-12-19 07:40:04,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:40:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258068230] [2023-12-19 07:40:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258068230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:40:04,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:40:04,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:40:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834205348] [2023-12-19 07:40:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:40:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 07:40:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:40:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 07:40:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:40:04,346 INFO L87 Difference]: Start difference. First operand 16365 states and 26878 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:40:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:40:06,631 INFO L93 Difference]: Finished difference Result 59915 states and 98419 transitions. [2023-12-19 07:40:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:40:06,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:40:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:40:06,711 INFO L225 Difference]: With dead ends: 59915 [2023-12-19 07:40:06,711 INFO L226 Difference]: Without dead ends: 43551 [2023-12-19 07:40:06,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-19 07:40:06,746 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 616 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 07:40:06,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 2283 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 07:40:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43551 states. [2023-12-19 07:40:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43551 to 43515. [2023-12-19 07:40:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43515 states, 39612 states have (on average 1.6313238412602242) internal successors, (64620), 39660 states have internal predecessors, (64620), 3392 states have call successors, (3392), 510 states have call predecessors, (3392), 510 states have return successors, (3392), 3344 states have call predecessors, (3392), 3392 states have call successors, (3392) [2023-12-19 07:40:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43515 states to 43515 states and 71404 transitions. [2023-12-19 07:40:09,495 INFO L78 Accepts]: Start accepts. Automaton has 43515 states and 71404 transitions. Word has length 554 [2023-12-19 07:40:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:40:09,495 INFO L495 AbstractCegarLoop]: Abstraction has 43515 states and 71404 transitions. [2023-12-19 07:40:09,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:40:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 43515 states and 71404 transitions. [2023-12-19 07:40:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:40:09,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:40:09,504 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:40:09,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-19 07:40:09,705 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 [2023-12-19 07:40:09,706 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:40:09,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:40:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1262052005, now seen corresponding path program 1 times [2023-12-19 07:40:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:40:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838212165] [2023-12-19 07:40:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:40:09,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:40:09,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227936258] [2023-12-19 07:40:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:09,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:40:09,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:40:09,744 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) [2023-12-19 07:40:09,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 07:40:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:40:10,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 07:40:10,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:40:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:40:10,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:40:10,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:40:10,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838212165] [2023-12-19 07:40:10,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:40:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227936258] [2023-12-19 07:40:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227936258] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:40:10,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:40:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:40:10,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676265843] [2023-12-19 07:40:10,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:40:10,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 07:40:10,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:40:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 07:40:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:40:10,616 INFO L87 Difference]: Start difference. First operand 43515 states and 71404 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:40:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:40:16,788 INFO L93 Difference]: Finished difference Result 138145 states and 225507 transitions. [2023-12-19 07:40:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:40:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:40:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:40:16,971 INFO L225 Difference]: With dead ends: 138145 [2023-12-19 07:40:16,971 INFO L226 Difference]: Without dead ends: 94631 [2023-12-19 07:40:17,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:40:17,022 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 926 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 07:40:17,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 1212 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 07:40:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94631 states. [2023-12-19 07:40:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94631 to 73483. [2023-12-19 07:40:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73483 states, 66484 states have (on average 1.63510017447807) internal successors, (108708), 66596 states have internal predecessors, (108708), 6048 states have call successors, (6048), 950 states have call predecessors, (6048), 950 states have return successors, (6048), 5936 states have call predecessors, (6048), 6048 states have call successors, (6048) [2023-12-19 07:40:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73483 states to 73483 states and 120804 transitions. [2023-12-19 07:40:22,114 INFO L78 Accepts]: Start accepts. Automaton has 73483 states and 120804 transitions. Word has length 554 [2023-12-19 07:40:22,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:40:22,115 INFO L495 AbstractCegarLoop]: Abstraction has 73483 states and 120804 transitions. [2023-12-19 07:40:22,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:40:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 73483 states and 120804 transitions. [2023-12-19 07:40:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:40:22,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:40:22,130 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:40:22,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-19 07:40:22,338 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 [2023-12-19 07:40:22,339 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:40:22,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:40:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -82796447, now seen corresponding path program 1 times [2023-12-19 07:40:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:40:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044969109] [2023-12-19 07:40:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:22,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:40:22,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:40:22,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67906747] [2023-12-19 07:40:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:40:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:40:22,380 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) [2023-12-19 07:40:22,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 07:40:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:40:22,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 07:40:22,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:40:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 2528 proven. 24 refuted. 0 times theorem prover too weak. 10408 trivial. 0 not checked. [2023-12-19 07:40:22,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:40:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 216 proven. 24 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:40:23,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:40:23,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044969109] [2023-12-19 07:40:23,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:40:23,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67906747] [2023-12-19 07:40:23,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67906747] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:40:23,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:40:23,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 07:40:23,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175151511] [2023-12-19 07:40:23,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:40:23,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 07:40:23,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:40:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 07:40:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 07:40:23,217 INFO L87 Difference]: Start difference. First operand 73483 states and 120804 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-12-19 07:40:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:40:27,962 INFO L93 Difference]: Finished difference Result 146549 states and 240663 transitions. [2023-12-19 07:40:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 07:40:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 554 [2023-12-19 07:40:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:40:28,108 INFO L225 Difference]: With dead ends: 146549 [2023-12-19 07:40:28,108 INFO L226 Difference]: Without dead ends: 73067 [2023-12-19 07:40:28,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1099 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-12-19 07:40:28,184 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 503 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:40:28,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 909 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:40:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73067 states. [2023-12-19 07:40:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73067 to 72011. [2023-12-19 07:40:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72011 states, 64996 states have (on average 1.6378238660840667) internal successors, (106452), 65108 states have internal predecessors, (106452), 6048 states have call successors, (6048), 966 states have call predecessors, (6048), 966 states have return successors, (6048), 5936 states have call predecessors, (6048), 6048 states have call successors, (6048) [2023-12-19 07:40:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72011 states to 72011 states and 118548 transitions. [2023-12-19 07:40:32,879 INFO L78 Accepts]: Start accepts. Automaton has 72011 states and 118548 transitions. Word has length 554 [2023-12-19 07:40:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:40:32,880 INFO L495 AbstractCegarLoop]: Abstraction has 72011 states and 118548 transitions. [2023-12-19 07:40:32,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-12-19 07:40:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 72011 states and 118548 transitions. [2023-12-19 07:40:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:40:32,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:40:32,893 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:40:32,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-19 07:40:33,093 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 [2023-12-19 07:40:33,094 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:40:33,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:40:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash -838405283, now seen corresponding path program 1 times [2023-12-19 07:40:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:40:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599548345] [2023-12-19 07:40:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:40:33,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:40:33,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663186648] [2023-12-19 07:40:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:40:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:40:33,135 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) [2023-12-19 07:40:33,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 07:40:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:40:33,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 07:40:33,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:40:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 7484 proven. 102 refuted. 0 times theorem prover too weak. 5374 trivial. 0 not checked. [2023-12-19 07:40:34,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:40:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 138 proven. 102 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:40:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:40:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599548345] [2023-12-19 07:40:34,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:40:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663186648] [2023-12-19 07:40:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663186648] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:40:34,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:40:34,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-19 07:40:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368575823] [2023-12-19 07:40:34,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:40:34,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 07:40:34,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:40:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 07:40:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-19 07:40:34,442 INFO L87 Difference]: Start difference. First operand 72011 states and 118548 transitions. Second operand has 12 states, 12 states have (on average 17.666666666666668) internal successors, (212), 12 states have internal predecessors, (212), 5 states have call successors, (115), 3 states have call predecessors, (115), 5 states have return successors, (116), 5 states have call predecessors, (116), 5 states have call successors, (116) [2023-12-19 07:40:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:40:39,967 INFO L93 Difference]: Finished difference Result 131077 states and 213303 transitions. [2023-12-19 07:40:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 07:40:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.666666666666668) internal successors, (212), 12 states have internal predecessors, (212), 5 states have call successors, (115), 3 states have call predecessors, (115), 5 states have return successors, (116), 5 states have call predecessors, (116), 5 states have call successors, (116) Word has length 554 [2023-12-19 07:40:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:40:40,115 INFO L225 Difference]: With dead ends: 131077 [2023-12-19 07:40:40,115 INFO L226 Difference]: Without dead ends: 59067 [2023-12-19 07:40:40,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-12-19 07:40:40,183 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 522 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 07:40:40,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1392 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 07:40:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59067 states. [2023-12-19 07:40:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59067 to 57915. [2023-12-19 07:40:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57915 states, 50868 states have (on average 1.5966816072973185) internal successors, (81220), 50980 states have internal predecessors, (81220), 6048 states have call successors, (6048), 998 states have call predecessors, (6048), 998 states have return successors, (6048), 5936 states have call predecessors, (6048), 6048 states have call successors, (6048) [2023-12-19 07:40:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57915 states to 57915 states and 93316 transitions. [2023-12-19 07:40:44,902 INFO L78 Accepts]: Start accepts. Automaton has 57915 states and 93316 transitions. Word has length 554 [2023-12-19 07:40:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:40:44,902 INFO L495 AbstractCegarLoop]: Abstraction has 57915 states and 93316 transitions. [2023-12-19 07:40:44,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.666666666666668) internal successors, (212), 12 states have internal predecessors, (212), 5 states have call successors, (115), 3 states have call predecessors, (115), 5 states have return successors, (116), 5 states have call predecessors, (116), 5 states have call successors, (116) [2023-12-19 07:40:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57915 states and 93316 transitions. [2023-12-19 07:40:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:40:44,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:40:44,913 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:40:44,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 07:40:45,120 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 [2023-12-19 07:40:45,121 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:40:45,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:40:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash 946210841, now seen corresponding path program 1 times [2023-12-19 07:40:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:40:45,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270472045] [2023-12-19 07:40:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:40:45,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:40:45,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164882965] [2023-12-19 07:40:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:45,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:40:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:40:45,160 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) [2023-12-19 07:40:45,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 07:40:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:40:45,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 07:40:45,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:40:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:40:46,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:40:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:40:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270472045] [2023-12-19 07:40:46,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:40:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164882965] [2023-12-19 07:40:46,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164882965] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:40:46,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:40:46,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:40:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974608828] [2023-12-19 07:40:46,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:40:46,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:40:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:40:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:40:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:40:46,125 INFO L87 Difference]: Start difference. First operand 57915 states and 93316 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:40:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:40:51,725 INFO L93 Difference]: Finished difference Result 131825 states and 212505 transitions. [2023-12-19 07:40:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 07:40:51,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:40:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:40:51,870 INFO L225 Difference]: With dead ends: 131825 [2023-12-19 07:40:51,870 INFO L226 Difference]: Without dead ends: 73911 [2023-12-19 07:40:51,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:40:51,929 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 461 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:40:51,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1394 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:40:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73911 states. [2023-12-19 07:40:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73911 to 62427. [2023-12-19 07:40:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62427 states, 55380 states have (on average 1.5971830985915494) internal successors, (88452), 55492 states have internal predecessors, (88452), 6048 states have call successors, (6048), 998 states have call predecessors, (6048), 998 states have return successors, (6048), 5936 states have call predecessors, (6048), 6048 states have call successors, (6048) [2023-12-19 07:40:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62427 states to 62427 states and 100548 transitions. [2023-12-19 07:40:56,899 INFO L78 Accepts]: Start accepts. Automaton has 62427 states and 100548 transitions. Word has length 554 [2023-12-19 07:40:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:40:56,899 INFO L495 AbstractCegarLoop]: Abstraction has 62427 states and 100548 transitions. [2023-12-19 07:40:56,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:40:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 62427 states and 100548 transitions. [2023-12-19 07:40:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:40:56,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:40:56,909 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:40:56,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 07:40:57,109 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 [2023-12-19 07:40:57,110 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:40:57,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:40:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 489759177, now seen corresponding path program 1 times [2023-12-19 07:40:57,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:40:57,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705484238] [2023-12-19 07:40:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:40:57,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:40:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873149543] [2023-12-19 07:40:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:40:57,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:40:57,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:40:57,148 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) [2023-12-19 07:40:57,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 07:40:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:40:57,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:40:57,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:40:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6504 proven. 108 refuted. 0 times theorem prover too weak. 6348 trivial. 0 not checked. [2023-12-19 07:40:57,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:40:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 132 proven. 108 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-12-19 07:40:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:40:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705484238] [2023-12-19 07:40:58,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:40:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873149543] [2023-12-19 07:40:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873149543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:40:58,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:40:58,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 07:40:58,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826926192] [2023-12-19 07:40:58,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:40:58,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 07:40:58,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:40:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 07:40:58,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 07:40:58,141 INFO L87 Difference]: Start difference. First operand 62427 states and 100548 transitions. Second operand has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-12-19 07:41:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:41:03,225 INFO L93 Difference]: Finished difference Result 118229 states and 187399 transitions. [2023-12-19 07:41:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:41:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 554 [2023-12-19 07:41:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:41:03,337 INFO L225 Difference]: With dead ends: 118229 [2023-12-19 07:41:03,338 INFO L226 Difference]: Without dead ends: 52699 [2023-12-19 07:41:03,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 07:41:03,389 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 638 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 07:41:03,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 833 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 07:41:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52699 states. [2023-12-19 07:41:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52699 to 51643. [2023-12-19 07:41:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51643 states, 44564 states have (on average 1.5180863477246207) internal successors, (67652), 44676 states have internal predecessors, (67652), 6048 states have call successors, (6048), 1030 states have call predecessors, (6048), 1030 states have return successors, (6048), 5936 states have call predecessors, (6048), 6048 states have call successors, (6048) [2023-12-19 07:41:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51643 states to 51643 states and 79748 transitions. [2023-12-19 07:41:08,090 INFO L78 Accepts]: Start accepts. Automaton has 51643 states and 79748 transitions. Word has length 554 [2023-12-19 07:41:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:41:08,091 INFO L495 AbstractCegarLoop]: Abstraction has 51643 states and 79748 transitions. [2023-12-19 07:41:08,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-12-19 07:41:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51643 states and 79748 transitions. [2023-12-19 07:41:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:41:08,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:41:08,098 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:41:08,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-19 07:41:08,301 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 [2023-12-19 07:41:08,302 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:41:08,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:41:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash 528814235, now seen corresponding path program 1 times [2023-12-19 07:41:08,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:41:08,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820280217] [2023-12-19 07:41:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:41:08,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:41:08,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:41:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924198125] [2023-12-19 07:41:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:41:08,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:41:08,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:41:08,342 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) [2023-12-19 07:41:08,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 07:41:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:41:08,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 07:41:08,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:41:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:41:09,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:41:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:41:09,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820280217] [2023-12-19 07:41:09,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:41:09,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924198125] [2023-12-19 07:41:09,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924198125] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:41:09,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:41:09,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 07:41:09,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756064469] [2023-12-19 07:41:09,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:41:09,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:41:09,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:41:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:41:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:41:09,474 INFO L87 Difference]: Start difference. First operand 51643 states and 79748 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:41:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:41:13,859 INFO L93 Difference]: Finished difference Result 103285 states and 159495 transitions. [2023-12-19 07:41:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:41:13,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:41:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:41:13,955 INFO L225 Difference]: With dead ends: 103285 [2023-12-19 07:41:13,955 INFO L226 Difference]: Without dead ends: 51643 [2023-12-19 07:41:14,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:41:14,002 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 166 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:41:14,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 428 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:41:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51643 states. [2023-12-19 07:41:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51643 to 51643. [2023-12-19 07:41:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51643 states, 44564 states have (on average 1.5065972533883853) internal successors, (67140), 44676 states have internal predecessors, (67140), 6048 states have call successors, (6048), 1030 states have call predecessors, (6048), 1030 states have return successors, (6048), 5936 states have call predecessors, (6048), 6048 states have call successors, (6048) [2023-12-19 07:41:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51643 states to 51643 states and 79236 transitions. [2023-12-19 07:41:18,834 INFO L78 Accepts]: Start accepts. Automaton has 51643 states and 79236 transitions. Word has length 554 [2023-12-19 07:41:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:41:18,836 INFO L495 AbstractCegarLoop]: Abstraction has 51643 states and 79236 transitions. [2023-12-19 07:41:18,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:41:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 51643 states and 79236 transitions. [2023-12-19 07:41:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:41:18,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:41:18,844 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:41:18,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-19 07:41:19,044 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 [2023-12-19 07:41:19,045 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:41:19,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:41:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1422300573, now seen corresponding path program 1 times [2023-12-19 07:41:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:41:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392966173] [2023-12-19 07:41:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:41:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:41:19,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:41:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482948405] [2023-12-19 07:41:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:41:19,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:41:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:41:19,087 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) [2023-12-19 07:41:19,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 07:41:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:41:19,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 07:41:19,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:41:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:41:19,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:41:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:41:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392966173] [2023-12-19 07:41:19,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:41:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482948405] [2023-12-19 07:41:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482948405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:41:19,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:41:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:41:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145216118] [2023-12-19 07:41:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:41:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:41:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:41:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:41:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:41:19,924 INFO L87 Difference]: Start difference. First operand 51643 states and 79236 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:41:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:41:31,178 INFO L93 Difference]: Finished difference Result 181753 states and 278733 transitions. [2023-12-19 07:41:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:41:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:41:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:41:31,463 INFO L225 Difference]: With dead ends: 181753 [2023-12-19 07:41:31,463 INFO L226 Difference]: Without dead ends: 130111 [2023-12-19 07:41:31,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:41:31,548 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 609 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:41:31,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1548 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:41:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130111 states. [2023-12-19 07:41:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130111 to 129147. [2023-12-19 07:41:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129147 states, 111288 states have (on average 1.503702106246855) internal successors, (167344), 111576 states have internal predecessors, (167344), 15248 states have call successors, (15248), 2610 states have call predecessors, (15248), 2610 states have return successors, (15248), 14960 states have call predecessors, (15248), 15248 states have call successors, (15248) [2023-12-19 07:41:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129147 states to 129147 states and 197840 transitions. [2023-12-19 07:41:44,033 INFO L78 Accepts]: Start accepts. Automaton has 129147 states and 197840 transitions. Word has length 554 [2023-12-19 07:41:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:41:44,034 INFO L495 AbstractCegarLoop]: Abstraction has 129147 states and 197840 transitions. [2023-12-19 07:41:44,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:41:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 129147 states and 197840 transitions. [2023-12-19 07:41:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:41:44,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:41:44,050 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:41:44,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-19 07:41:44,258 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 [2023-12-19 07:41:44,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:41:44,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:41:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1918726565, now seen corresponding path program 1 times [2023-12-19 07:41:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:41:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464992395] [2023-12-19 07:41:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:41:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:41:44,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:41:44,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133389190] [2023-12-19 07:41:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:41:44,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:41:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:41:44,295 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) [2023-12-19 07:41:44,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 07:41:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:41:44,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 07:41:44,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:41:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:41:46,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:41:46,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:41:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464992395] [2023-12-19 07:41:46,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:41:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133389190] [2023-12-19 07:41:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133389190] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:41:46,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:41:46,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:41:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779381762] [2023-12-19 07:41:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:41:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 07:41:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:41:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 07:41:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:41:46,076 INFO L87 Difference]: Start difference. First operand 129147 states and 197840 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:41:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:41:58,052 INFO L93 Difference]: Finished difference Result 269725 states and 414060 transitions. [2023-12-19 07:41:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 07:41:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:41:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:41:58,498 INFO L225 Difference]: With dead ends: 269725 [2023-12-19 07:41:58,498 INFO L226 Difference]: Without dead ends: 140579 [2023-12-19 07:41:58,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:41:58,608 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 548 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 07:41:58,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1806 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 07:41:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140579 states. [2023-12-19 07:42:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140579 to 129523. [2023-12-19 07:42:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129523 states, 111670 states have (on average 1.503770036715322) internal successors, (167926), 111958 states have internal predecessors, (167926), 15280 states have call successors, (15280), 2572 states have call predecessors, (15280), 2572 states have return successors, (15280), 14992 states have call predecessors, (15280), 15280 states have call successors, (15280) [2023-12-19 07:42:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129523 states to 129523 states and 198486 transitions. [2023-12-19 07:42:10,840 INFO L78 Accepts]: Start accepts. Automaton has 129523 states and 198486 transitions. Word has length 554 [2023-12-19 07:42:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:42:10,841 INFO L495 AbstractCegarLoop]: Abstraction has 129523 states and 198486 transitions. [2023-12-19 07:42:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:42:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 129523 states and 198486 transitions. [2023-12-19 07:42:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:42:10,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:42:10,875 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:42:10,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 07:42:11,085 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 [2023-12-19 07:42:11,086 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:42:11,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:42:11,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1367545377, now seen corresponding path program 1 times [2023-12-19 07:42:11,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:42:11,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027788032] [2023-12-19 07:42:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:42:11,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:42:11,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:42:11,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999351097] [2023-12-19 07:42:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:42:11,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:42:11,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:42:11,126 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:42:11,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-19 07:42:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:42:11,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 07:42:11,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:42:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-19 07:42:11,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:42:11,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:42:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027788032] [2023-12-19 07:42:11,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:42:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999351097] [2023-12-19 07:42:11,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999351097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:42:11,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:42:11,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:42:11,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760531902] [2023-12-19 07:42:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:42:11,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:42:11,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:42:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:42:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:42:11,571 INFO L87 Difference]: Start difference. First operand 129523 states and 198486 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:42:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:42:26,936 INFO L93 Difference]: Finished difference Result 227099 states and 348048 transitions. [2023-12-19 07:42:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:42:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 554 [2023-12-19 07:42:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:42:27,316 INFO L225 Difference]: With dead ends: 227099 [2023-12-19 07:42:27,316 INFO L226 Difference]: Without dead ends: 178431 [2023-12-19 07:42:27,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:42:27,409 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 444 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:42:27,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1928 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:42:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178431 states. [2023-12-19 07:42:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178431 to 177509. [2023-12-19 07:42:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177509 states, 152960 states have (on average 1.5032819037656904) internal successors, (229942), 153356 states have internal predecessors, (229942), 21002 states have call successors, (21002), 3546 states have call predecessors, (21002), 3546 states have return successors, (21002), 20606 states have call predecessors, (21002), 21002 states have call successors, (21002) [2023-12-19 07:42:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177509 states to 177509 states and 271946 transitions. [2023-12-19 07:42:44,013 INFO L78 Accepts]: Start accepts. Automaton has 177509 states and 271946 transitions. Word has length 554 [2023-12-19 07:42:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:42:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 177509 states and 271946 transitions. [2023-12-19 07:42:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-12-19 07:42:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 177509 states and 271946 transitions. [2023-12-19 07:42:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-19 07:42:44,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:42:44,031 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:42:44,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-19 07:42:44,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:42:44,239 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:42:44,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:42:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2118075293, now seen corresponding path program 1 times [2023-12-19 07:42:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:42:44,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214652091] [2023-12-19 07:42:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:42:44,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:42:44,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:42:44,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995997884] [2023-12-19 07:42:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:42:44,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:42:44,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:42:44,516 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:42:44,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-19 07:42:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:42:45,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-19 07:42:45,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:42:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 8779 proven. 615 refuted. 0 times theorem prover too weak. 3566 trivial. 0 not checked. [2023-12-19 07:42:59,940 INFO L327 TraceCheckSpWp]: Computing backward predicates...