/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-83.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 20:02:16,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 20:02:16,496 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 20:02:16,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 20:02:16,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 20:02:16,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 20:02:16,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 20:02:16,544 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 20:02:16,544 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 20:02:16,548 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 20:02:16,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 20:02:16,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 20:02:16,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 20:02:16,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 20:02:16,551 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 20:02:16,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 20:02:16,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 20:02:16,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 20:02:16,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 20:02:16,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 20:02:16,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 20:02:16,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 20:02:16,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 20:02:16,554 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 20:02:16,554 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 20:02:16,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 20:02:16,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 20:02:16,555 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 20:02:16,555 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 20:02:16,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 20:02:16,556 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 20:02:16,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 20:02:16,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 20:02:16,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 20:02:16,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 20:02:16,557 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 20:02:16,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 20:02:16,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 20:02:16,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 20:02:16,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 20:02:16,558 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 20:02:16,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 20:02:16,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 20:02:16,559 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 20:02:16,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 20:02:16,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 20:02:16,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 20:02:16,827 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 20:02:16,827 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 20:02:16,828 INFO L431 ainManager$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-83.i [2023-12-15 20:02:18,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 20:02:18,262 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 20:02:18,263 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-12-15 20:02:18,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b611500/b079f858413f407299b1b62f4bed2f1d/FLAG8f2b9562e [2023-12-15 20:02:18,289 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b611500/b079f858413f407299b1b62f4bed2f1d [2023-12-15 20:02:18,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 20:02:18,296 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 20:02:18,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 20:02:18,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 20:02:18,304 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 20:02:18,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:18,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a631f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18, skipping insertion in model container [2023-12-15 20:02:18,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:18,354 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 20:02:18,470 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-83.i[916,929] [2023-12-15 20:02:18,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 20:02:18,676 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 20:02:18,697 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-83.i[916,929] [2023-12-15 20:02:18,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 20:02:18,834 INFO L206 MainTranslator]: Completed translation [2023-12-15 20:02:18,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18 WrapperNode [2023-12-15 20:02:18,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 20:02:18,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 20:02:18,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 20:02:18,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 20:02:18,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:18,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:18,997 INFO L138 Inliner]: procedures = 26, calls = 118, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1006 [2023-12-15 20:02:18,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 20:02:18,999 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 20:02:18,999 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 20:02:19,002 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 20:02:19,012 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,026 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,094 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 20:02:19,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,150 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 20:02:19,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 20:02:19,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 20:02:19,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 20:02:19,170 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (1/1) ... [2023-12-15 20:02:19,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 20:02:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:19,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 20:02:19,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 20:02:19,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 20:02:19,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 20:02:19,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 20:02:19,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 20:02:19,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 20:02:19,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 20:02:19,398 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 20:02:19,400 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 20:02:20,459 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 20:02:20,514 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 20:02:20,515 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 20:02:20,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:02:20 BoogieIcfgContainer [2023-12-15 20:02:20,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 20:02:20,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 20:02:20,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 20:02:20,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 20:02:20,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:02:18" (1/3) ... [2023-12-15 20:02:20,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a5e364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:02:20, skipping insertion in model container [2023-12-15 20:02:20,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:02:18" (2/3) ... [2023-12-15 20:02:20,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a5e364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:02:20, skipping insertion in model container [2023-12-15 20:02:20,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:02:20" (3/3) ... [2023-12-15 20:02:20,524 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-12-15 20:02:20,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 20:02:20,540 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 20:02:20,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 20:02:20,609 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;@ee20702, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 20:02:20,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 20:02:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 243 states have (on average 1.683127572016461) internal successors, (409), 244 states have internal predecessors, (409), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-12-15 20:02:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2023-12-15 20:02:20,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:20,653 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:20,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:20,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1789949882, now seen corresponding path program 1 times [2023-12-15 20:02:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:20,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357451195] [2023-12-15 20:02:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:21,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:21,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357451195] [2023-12-15 20:02:21,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 20:02:21,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215885742] [2023-12-15 20:02:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:21,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:21,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 20:02:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:21,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 20:02:21,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 21632 trivial. 0 not checked. [2023-12-15 20:02:21,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215885742] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:21,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:21,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 20:02:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974734482] [2023-12-15 20:02:21,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:21,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 20:02:21,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 20:02:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 20:02:21,674 INFO L87 Difference]: Start difference. First operand has 351 states, 243 states have (on average 1.683127572016461) internal successors, (409), 244 states have internal predecessors, (409), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) [2023-12-15 20:02:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:21,766 INFO L93 Difference]: Finished difference Result 699 states and 1341 transitions. [2023-12-15 20:02:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 20:02:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) Word has length 681 [2023-12-15 20:02:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:21,779 INFO L225 Difference]: With dead ends: 699 [2023-12-15 20:02:21,780 INFO L226 Difference]: Without dead ends: 349 [2023-12-15 20:02:21,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 20:02:21,788 INFO L413 NwaCegarLoop]: 611 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, 611 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:21,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 611 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:02:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-12-15 20:02:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-12-15 20:02:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 242 states have (on average 1.6694214876033058) internal successors, (404), 242 states have internal predecessors, (404), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-12-15 20:02:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 614 transitions. [2023-12-15 20:02:21,870 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 614 transitions. Word has length 681 [2023-12-15 20:02:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:21,870 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 614 transitions. [2023-12-15 20:02:21,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) [2023-12-15 20:02:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 614 transitions. [2023-12-15 20:02:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2023-12-15 20:02:21,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:21,885 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:21,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:22,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-15 20:02:22,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:22,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash -548201424, now seen corresponding path program 1 times [2023-12-15 20:02:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383169631] [2023-12-15 20:02:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:22,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253578976] [2023-12-15 20:02:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:22,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:22,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:22,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 20:02:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:22,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 20:02:22,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:22,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383169631] [2023-12-15 20:02:22,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253578976] [2023-12-15 20:02:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253578976] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:22,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:22,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 20:02:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576320286] [2023-12-15 20:02:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 20:02:22,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:22,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 20:02:22,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:22,820 INFO L87 Difference]: Start difference. First operand 349 states and 614 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:22,887 INFO L93 Difference]: Finished difference Result 697 states and 1227 transitions. [2023-12-15 20:02:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 20:02:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 681 [2023-12-15 20:02:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:22,895 INFO L225 Difference]: With dead ends: 697 [2023-12-15 20:02:22,895 INFO L226 Difference]: Without dead ends: 349 [2023-12-15 20:02:22,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:22,898 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 0 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:22,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1212 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:02:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-12-15 20:02:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-12-15 20:02:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 242 states have (on average 1.665289256198347) internal successors, (403), 242 states have internal predecessors, (403), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-12-15 20:02:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 613 transitions. [2023-12-15 20:02:22,946 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 613 transitions. Word has length 681 [2023-12-15 20:02:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:22,950 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 613 transitions. [2023-12-15 20:02:22,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 613 transitions. [2023-12-15 20:02:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2023-12-15 20:02:22,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:22,956 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:22,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:23,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-15 20:02:23,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:23,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 111330098, now seen corresponding path program 1 times [2023-12-15 20:02:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938476887] [2023-12-15 20:02:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:23,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:23,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95527219] [2023-12-15 20:02:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:23,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:23,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:23,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:23,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 20:02:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:23,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 20:02:23,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:23,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938476887] [2023-12-15 20:02:23,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:23,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95527219] [2023-12-15 20:02:23,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95527219] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:23,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:23,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 20:02:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193577646] [2023-12-15 20:02:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 20:02:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 20:02:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:23,791 INFO L87 Difference]: Start difference. First operand 349 states and 613 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:23,841 INFO L93 Difference]: Finished difference Result 920 states and 1624 transitions. [2023-12-15 20:02:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 20:02:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 681 [2023-12-15 20:02:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:23,847 INFO L225 Difference]: With dead ends: 920 [2023-12-15 20:02:23,847 INFO L226 Difference]: Without dead ends: 572 [2023-12-15 20:02:23,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:23,849 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 377 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:23,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1211 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:02:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2023-12-15 20:02:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 569. [2023-12-15 20:02:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 417 states have (on average 1.7050359712230216) internal successors, (711), 418 states have internal predecessors, (711), 149 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-12-15 20:02:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1009 transitions. [2023-12-15 20:02:23,892 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1009 transitions. Word has length 681 [2023-12-15 20:02:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 1009 transitions. [2023-12-15 20:02:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1009 transitions. [2023-12-15 20:02:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2023-12-15 20:02:23,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:23,902 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:23,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:24,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:24,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:24,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 56937200, now seen corresponding path program 1 times [2023-12-15 20:02:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:24,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691045211] [2023-12-15 20:02:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:24,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:24,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:24,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812458853] [2023-12-15 20:02:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:24,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:24,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 20:02:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:24,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 20:02:24,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:24,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:24,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:24,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691045211] [2023-12-15 20:02:24,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:24,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812458853] [2023-12-15 20:02:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812458853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:24,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 20:02:24,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970420501] [2023-12-15 20:02:24,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:24,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 20:02:24,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 20:02:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:24,703 INFO L87 Difference]: Start difference. First operand 569 states and 1009 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:24,779 INFO L93 Difference]: Finished difference Result 1499 states and 2652 transitions. [2023-12-15 20:02:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 20:02:24,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 681 [2023-12-15 20:02:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:24,787 INFO L225 Difference]: With dead ends: 1499 [2023-12-15 20:02:24,787 INFO L226 Difference]: Without dead ends: 931 [2023-12-15 20:02:24,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:24,791 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 303 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:24,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1315 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:02:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-12-15 20:02:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 928. [2023-12-15 20:02:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 684 states have (on average 1.6871345029239766) internal successors, (1154), 687 states have internal predecessors, (1154), 239 states have call successors, (239), 4 states have call predecessors, (239), 4 states have return successors, (239), 236 states have call predecessors, (239), 239 states have call successors, (239) [2023-12-15 20:02:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1632 transitions. [2023-12-15 20:02:24,866 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1632 transitions. Word has length 681 [2023-12-15 20:02:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:24,868 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1632 transitions. [2023-12-15 20:02:24,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1632 transitions. [2023-12-15 20:02:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2023-12-15 20:02:24,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:24,900 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:24,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:25,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:25,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:25,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1882224846, now seen corresponding path program 1 times [2023-12-15 20:02:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730424411] [2023-12-15 20:02:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:25,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:25,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865225678] [2023-12-15 20:02:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:25,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:25,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:25,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:25,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 20:02:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:25,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:02:25,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 8672 proven. 228 refuted. 0 times theorem prover too weak. 12940 trivial. 0 not checked. [2023-12-15 20:02:26,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 84 proven. 228 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-12-15 20:02:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730424411] [2023-12-15 20:02:26,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:26,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865225678] [2023-12-15 20:02:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865225678] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:26,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 20:02:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128286541] [2023-12-15 20:02:26,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 20:02:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 20:02:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 20:02:26,575 INFO L87 Difference]: Start difference. First operand 928 states and 1632 transitions. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) [2023-12-15 20:02:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:27,179 INFO L93 Difference]: Finished difference Result 1879 states and 3283 transitions. [2023-12-15 20:02:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 20:02:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) Word has length 681 [2023-12-15 20:02:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:27,186 INFO L225 Difference]: With dead ends: 1879 [2023-12-15 20:02:27,186 INFO L226 Difference]: Without dead ends: 952 [2023-12-15 20:02:27,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1364 GetRequests, 1354 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:02:27,190 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 734 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:27,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1194 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 20:02:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-12-15 20:02:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 944. [2023-12-15 20:02:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 696 states have (on average 1.6724137931034482) internal successors, (1164), 699 states have internal predecessors, (1164), 239 states have call successors, (239), 8 states have call predecessors, (239), 8 states have return successors, (239), 236 states have call predecessors, (239), 239 states have call successors, (239) [2023-12-15 20:02:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1642 transitions. [2023-12-15 20:02:27,250 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1642 transitions. Word has length 681 [2023-12-15 20:02:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1642 transitions. [2023-12-15 20:02:27,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) [2023-12-15 20:02:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1642 transitions. [2023-12-15 20:02:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2023-12-15 20:02:27,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:27,257 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:27,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:27,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:27,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:27,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 226007754, now seen corresponding path program 1 times [2023-12-15 20:02:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800816577] [2023-12-15 20:02:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:27,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:27,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553434567] [2023-12-15 20:02:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:27,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:27,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:27,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:27,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 20:02:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:27,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 20:02:27,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:28,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800816577] [2023-12-15 20:02:28,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553434567] [2023-12-15 20:02:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553434567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:28,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 20:02:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952508308] [2023-12-15 20:02:28,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:28,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 20:02:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 20:02:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-15 20:02:28,128 INFO L87 Difference]: Start difference. First operand 944 states and 1642 transitions. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:30,141 INFO L93 Difference]: Finished difference Result 6149 states and 10798 transitions. [2023-12-15 20:02:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 20:02:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 682 [2023-12-15 20:02:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:30,168 INFO L225 Difference]: With dead ends: 6149 [2023-12-15 20:02:30,168 INFO L226 Difference]: Without dead ends: 5206 [2023-12-15 20:02:30,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:02:30,176 INFO L413 NwaCegarLoop]: 1405 mSDtfsCounter, 2484 mSDsluCounter, 4629 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 6034 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:30,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2484 Valid, 6034 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-15 20:02:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2023-12-15 20:02:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 1998. [2023-12-15 20:02:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1546 states have (on average 1.6985769728331177) internal successors, (2626), 1553 states have internal predecessors, (2626), 427 states have call successors, (427), 24 states have call predecessors, (427), 24 states have return successors, (427), 420 states have call predecessors, (427), 427 states have call successors, (427) [2023-12-15 20:02:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3480 transitions. [2023-12-15 20:02:30,409 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3480 transitions. Word has length 682 [2023-12-15 20:02:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:30,410 INFO L495 AbstractCegarLoop]: Abstraction has 1998 states and 3480 transitions. [2023-12-15 20:02:30,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3480 transitions. [2023-12-15 20:02:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2023-12-15 20:02:30,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:30,417 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:30,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:30,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:30,625 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:30,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1780869040, now seen corresponding path program 1 times [2023-12-15 20:02:30,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:30,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489697449] [2023-12-15 20:02:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:30,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:30,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311443433] [2023-12-15 20:02:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:30,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:30,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:30,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:30,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 20:02:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:31,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:02:31,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 9968 proven. 204 refuted. 0 times theorem prover too weak. 11668 trivial. 0 not checked. [2023-12-15 20:02:31,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 108 proven. 204 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-12-15 20:02:31,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:31,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489697449] [2023-12-15 20:02:31,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:31,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311443433] [2023-12-15 20:02:31,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311443433] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:31,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:31,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 20:02:31,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100622658] [2023-12-15 20:02:31,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:31,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 20:02:31,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 20:02:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 20:02:31,968 INFO L87 Difference]: Start difference. First operand 1998 states and 3480 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) [2023-12-15 20:02:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:32,571 INFO L93 Difference]: Finished difference Result 4059 states and 7015 transitions. [2023-12-15 20:02:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 20:02:32,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) Word has length 683 [2023-12-15 20:02:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:32,589 INFO L225 Difference]: With dead ends: 4059 [2023-12-15 20:02:32,589 INFO L226 Difference]: Without dead ends: 2062 [2023-12-15 20:02:32,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1368 GetRequests, 1358 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:02:32,599 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 1062 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:32,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 1241 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 20:02:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2023-12-15 20:02:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 2030. [2023-12-15 20:02:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1570 states have (on average 1.6828025477707007) internal successors, (2642), 1577 states have internal predecessors, (2642), 427 states have call successors, (427), 32 states have call predecessors, (427), 32 states have return successors, (427), 420 states have call predecessors, (427), 427 states have call successors, (427) [2023-12-15 20:02:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3496 transitions. [2023-12-15 20:02:32,735 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3496 transitions. Word has length 683 [2023-12-15 20:02:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:32,735 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 3496 transitions. [2023-12-15 20:02:32,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) [2023-12-15 20:02:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3496 transitions. [2023-12-15 20:02:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2023-12-15 20:02:32,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:32,743 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:32,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:32,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:32,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:32,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1508593743, now seen corresponding path program 1 times [2023-12-15 20:02:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:32,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674652387] [2023-12-15 20:02:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:32,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:33,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:33,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16928368] [2023-12-15 20:02:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:33,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:33,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:33,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:33,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 20:02:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:33,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:02:33,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4704 proven. 36 refuted. 0 times theorem prover too weak. 17100 trivial. 0 not checked. [2023-12-15 20:02:33,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 276 proven. 36 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-12-15 20:02:34,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674652387] [2023-12-15 20:02:34,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16928368] [2023-12-15 20:02:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16928368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:34,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 20:02:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108986107] [2023-12-15 20:02:34,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:34,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 20:02:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 20:02:34,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 20:02:34,020 INFO L87 Difference]: Start difference. First operand 2030 states and 3496 transitions. Second operand has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 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) [2023-12-15 20:02:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:34,658 INFO L93 Difference]: Finished difference Result 4095 states and 7026 transitions. [2023-12-15 20:02:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 20:02:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 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 684 [2023-12-15 20:02:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:34,669 INFO L225 Difference]: With dead ends: 4095 [2023-12-15 20:02:34,670 INFO L226 Difference]: Without dead ends: 2066 [2023-12-15 20:02:34,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1360 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:02:34,676 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 748 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:34,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1263 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 20:02:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2023-12-15 20:02:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2034. [2023-12-15 20:02:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1573 states have (on average 1.6713286713286712) internal successors, (2629), 1580 states have internal predecessors, (2629), 427 states have call successors, (427), 33 states have call predecessors, (427), 33 states have return successors, (427), 420 states have call predecessors, (427), 427 states have call successors, (427) [2023-12-15 20:02:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 3483 transitions. [2023-12-15 20:02:34,802 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 3483 transitions. Word has length 684 [2023-12-15 20:02:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:34,803 INFO L495 AbstractCegarLoop]: Abstraction has 2034 states and 3483 transitions. [2023-12-15 20:02:34,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 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) [2023-12-15 20:02:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 3483 transitions. [2023-12-15 20:02:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-12-15 20:02:34,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:34,809 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:34,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-15 20:02:35,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:35,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1480618568, now seen corresponding path program 1 times [2023-12-15 20:02:35,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:35,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919296609] [2023-12-15 20:02:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:35,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:35,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155312749] [2023-12-15 20:02:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:35,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:35,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:35,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 20:02:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:35,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:02:35,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 10914 proven. 171 refuted. 0 times theorem prover too weak. 10755 trivial. 0 not checked. [2023-12-15 20:02:35,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 141 proven. 171 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-12-15 20:02:36,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919296609] [2023-12-15 20:02:36,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155312749] [2023-12-15 20:02:36,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155312749] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:36,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 20:02:36,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950220610] [2023-12-15 20:02:36,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:36,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 20:02:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 20:02:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 20:02:36,344 INFO L87 Difference]: Start difference. First operand 2034 states and 3483 transitions. Second operand has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) [2023-12-15 20:02:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:36,903 INFO L93 Difference]: Finished difference Result 3313 states and 5687 transitions. [2023-12-15 20:02:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 20:02:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) Word has length 685 [2023-12-15 20:02:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:36,911 INFO L225 Difference]: With dead ends: 3313 [2023-12-15 20:02:36,911 INFO L226 Difference]: Without dead ends: 1280 [2023-12-15 20:02:36,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1362 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 20:02:36,916 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 683 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:36,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1234 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 20:02:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2023-12-15 20:02:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1260. [2023-12-15 20:02:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 993 states have (on average 1.6747230614300102) internal successors, (1663), 996 states have internal predecessors, (1663), 247 states have call successors, (247), 19 states have call predecessors, (247), 19 states have return successors, (247), 244 states have call predecessors, (247), 247 states have call successors, (247) [2023-12-15 20:02:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2157 transitions. [2023-12-15 20:02:37,057 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2157 transitions. Word has length 685 [2023-12-15 20:02:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:37,058 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 2157 transitions. [2023-12-15 20:02:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) [2023-12-15 20:02:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2157 transitions. [2023-12-15 20:02:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-12-15 20:02:37,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:37,065 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:37,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:37,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:37,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:37,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash 706039544, now seen corresponding path program 1 times [2023-12-15 20:02:37,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:37,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084597363] [2023-12-15 20:02:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:37,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780953756] [2023-12-15 20:02:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:37,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:37,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:37,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:37,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 20:02:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:37,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 20:02:37,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 14496 proven. 81 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2023-12-15 20:02:38,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 231 proven. 81 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-12-15 20:02:39,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:39,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084597363] [2023-12-15 20:02:39,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:39,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780953756] [2023-12-15 20:02:39,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780953756] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:39,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:39,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-15 20:02:39,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396863791] [2023-12-15 20:02:39,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 20:02:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 20:02:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-12-15 20:02:39,483 INFO L87 Difference]: Start difference. First operand 1260 states and 2157 transitions. Second operand has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 5 states have call successors, (168), 3 states have call predecessors, (168), 5 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-12-15 20:02:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:40,641 INFO L93 Difference]: Finished difference Result 3309 states and 5627 transitions. [2023-12-15 20:02:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 20:02:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 5 states have call successors, (168), 3 states have call predecessors, (168), 5 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) Word has length 685 [2023-12-15 20:02:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:40,651 INFO L225 Difference]: With dead ends: 3309 [2023-12-15 20:02:40,651 INFO L226 Difference]: Without dead ends: 2050 [2023-12-15 20:02:40,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1375 GetRequests, 1356 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-12-15 20:02:40,655 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 2171 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2282 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:40,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2282 Valid, 1899 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 20:02:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2023-12-15 20:02:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 2016. [2023-12-15 20:02:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 1600 states have (on average 1.665) internal successors, (2664), 1607 states have internal predecessors, (2664), 383 states have call successors, (383), 32 states have call predecessors, (383), 32 states have return successors, (383), 376 states have call predecessors, (383), 383 states have call successors, (383) [2023-12-15 20:02:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3430 transitions. [2023-12-15 20:02:40,848 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3430 transitions. Word has length 685 [2023-12-15 20:02:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:40,849 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 3430 transitions. [2023-12-15 20:02:40,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 5 states have call successors, (168), 3 states have call predecessors, (168), 5 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-12-15 20:02:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3430 transitions. [2023-12-15 20:02:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-15 20:02:40,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:40,860 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:40,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:41,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 20:02:41,070 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:41,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1933829663, now seen corresponding path program 1 times [2023-12-15 20:02:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:41,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659766830] [2023-12-15 20:02:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:41,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:41,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144225368] [2023-12-15 20:02:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:41,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:41,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:41,123 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:41,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 20:02:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:41,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 20:02:41,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 15236 proven. 198 refuted. 0 times theorem prover too weak. 6406 trivial. 0 not checked. [2023-12-15 20:02:42,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 114 proven. 198 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-12-15 20:02:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659766830] [2023-12-15 20:02:43,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144225368] [2023-12-15 20:02:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144225368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:43,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-15 20:02:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368553425] [2023-12-15 20:02:43,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 20:02:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 20:02:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-12-15 20:02:43,182 INFO L87 Difference]: Start difference. First operand 2016 states and 3430 transitions. Second operand has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 7 states have call successors, (171), 4 states have call predecessors, (171), 6 states have return successors, (172), 7 states have call predecessors, (172), 7 states have call successors, (172) [2023-12-15 20:02:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:44,830 INFO L93 Difference]: Finished difference Result 7289 states and 12272 transitions. [2023-12-15 20:02:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-15 20:02:44,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 7 states have call successors, (171), 4 states have call predecessors, (171), 6 states have return successors, (172), 7 states have call predecessors, (172), 7 states have call successors, (172) Word has length 686 [2023-12-15 20:02:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:44,854 INFO L225 Difference]: With dead ends: 7289 [2023-12-15 20:02:44,854 INFO L226 Difference]: Without dead ends: 5274 [2023-12-15 20:02:44,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1359 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2023-12-15 20:02:44,859 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 1537 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:44,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1613 Valid, 2194 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-15 20:02:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5274 states. [2023-12-15 20:02:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5274 to 2528. [2023-12-15 20:02:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2024 states have (on average 1.6536561264822134) internal successors, (3347), 2033 states have internal predecessors, (3347), 455 states have call successors, (455), 48 states have call predecessors, (455), 48 states have return successors, (455), 446 states have call predecessors, (455), 455 states have call successors, (455) [2023-12-15 20:02:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 4257 transitions. [2023-12-15 20:02:45,149 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 4257 transitions. Word has length 686 [2023-12-15 20:02:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:45,150 INFO L495 AbstractCegarLoop]: Abstraction has 2528 states and 4257 transitions. [2023-12-15 20:02:45,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 7 states have call successors, (171), 4 states have call predecessors, (171), 6 states have return successors, (172), 7 states have call predecessors, (172), 7 states have call successors, (172) [2023-12-15 20:02:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 4257 transitions. [2023-12-15 20:02:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-15 20:02:45,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:45,160 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:45,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:45,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 20:02:45,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:45,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1393786979, now seen corresponding path program 1 times [2023-12-15 20:02:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:45,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672055224] [2023-12-15 20:02:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:45,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:45,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:45,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323497864] [2023-12-15 20:02:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:45,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:45,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:45,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:45,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 20:02:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:45,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 20:02:45,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:45,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:45,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:45,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672055224] [2023-12-15 20:02:45,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:45,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323497864] [2023-12-15 20:02:45,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323497864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:45,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:45,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 20:02:45,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952459406] [2023-12-15 20:02:45,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:45,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 20:02:45,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 20:02:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:45,943 INFO L87 Difference]: Start difference. First operand 2528 states and 4257 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:46,127 INFO L93 Difference]: Finished difference Result 5070 states and 8543 transitions. [2023-12-15 20:02:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 20:02:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 686 [2023-12-15 20:02:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:46,142 INFO L225 Difference]: With dead ends: 5070 [2023-12-15 20:02:46,142 INFO L226 Difference]: Without dead ends: 2543 [2023-12-15 20:02:46,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:02:46,148 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 0 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:46,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1182 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:02:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2023-12-15 20:02:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2543. [2023-12-15 20:02:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2039 states have (on average 1.6488474742520844) internal successors, (3362), 2048 states have internal predecessors, (3362), 455 states have call successors, (455), 48 states have call predecessors, (455), 48 states have return successors, (455), 446 states have call predecessors, (455), 455 states have call successors, (455) [2023-12-15 20:02:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 4272 transitions. [2023-12-15 20:02:46,418 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 4272 transitions. Word has length 686 [2023-12-15 20:02:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:46,419 INFO L495 AbstractCegarLoop]: Abstraction has 2543 states and 4272 transitions. [2023-12-15 20:02:46,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 4272 transitions. [2023-12-15 20:02:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-15 20:02:46,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:46,426 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:46,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:46,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-15 20:02:46,637 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:46,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1685026591, now seen corresponding path program 1 times [2023-12-15 20:02:46,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:46,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905572042] [2023-12-15 20:02:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:46,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:46,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:46,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76592479] [2023-12-15 20:02:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:46,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:46,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:46,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:46,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 20:02:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:47,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:02:47,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:47,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:47,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905572042] [2023-12-15 20:02:47,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76592479] [2023-12-15 20:02:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76592479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:47,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 20:02:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377645785] [2023-12-15 20:02:47,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 20:02:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 20:02:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:02:47,216 INFO L87 Difference]: Start difference. First operand 2543 states and 4272 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:47,708 INFO L93 Difference]: Finished difference Result 7085 states and 11815 transitions. [2023-12-15 20:02:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 20:02:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 686 [2023-12-15 20:02:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:47,723 INFO L225 Difference]: With dead ends: 7085 [2023-12-15 20:02:47,724 INFO L226 Difference]: Without dead ends: 4543 [2023-12-15 20:02:47,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:02:47,731 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 359 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:47,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1942 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 20:02:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-12-15 20:02:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4168. [2023-12-15 20:02:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 3276 states have (on average 1.6175213675213675) internal successors, (5299), 3293 states have internal predecessors, (5299), 804 states have call successors, (804), 87 states have call predecessors, (804), 87 states have return successors, (804), 787 states have call predecessors, (804), 804 states have call successors, (804) [2023-12-15 20:02:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 6907 transitions. [2023-12-15 20:02:48,112 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 6907 transitions. Word has length 686 [2023-12-15 20:02:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:48,113 INFO L495 AbstractCegarLoop]: Abstraction has 4168 states and 6907 transitions. [2023-12-15 20:02:48,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 6907 transitions. [2023-12-15 20:02:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-15 20:02:48,121 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:48,122 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:48,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:48,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 20:02:48,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:48,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash -683525335, now seen corresponding path program 1 times [2023-12-15 20:02:48,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:48,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224215657] [2023-12-15 20:02:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:48,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:48,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235105110] [2023-12-15 20:02:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:48,378 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:48,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 20:02:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:48,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 20:02:48,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-12-15 20:02:48,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:02:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:48,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224215657] [2023-12-15 20:02:48,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235105110] [2023-12-15 20:02:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235105110] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:02:48,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:02:48,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 20:02:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732129357] [2023-12-15 20:02:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:02:48,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 20:02:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 20:02:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:02:48,861 INFO L87 Difference]: Start difference. First operand 4168 states and 6907 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:49,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:49,773 INFO L93 Difference]: Finished difference Result 11109 states and 18204 transitions. [2023-12-15 20:02:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 20:02:49,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 686 [2023-12-15 20:02:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:49,795 INFO L225 Difference]: With dead ends: 11109 [2023-12-15 20:02:49,795 INFO L226 Difference]: Without dead ends: 6942 [2023-12-15 20:02:49,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:02:49,805 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 639 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:49,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1779 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 20:02:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2023-12-15 20:02:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 5538. [2023-12-15 20:02:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 4306 states have (on average 1.6003251277287507) internal successors, (6891), 4331 states have internal predecessors, (6891), 1108 states have call successors, (1108), 123 states have call predecessors, (1108), 123 states have return successors, (1108), 1083 states have call predecessors, (1108), 1108 states have call successors, (1108) [2023-12-15 20:02:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 9107 transitions. [2023-12-15 20:02:50,440 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 9107 transitions. Word has length 686 [2023-12-15 20:02:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:02:50,441 INFO L495 AbstractCegarLoop]: Abstraction has 5538 states and 9107 transitions. [2023-12-15 20:02:50,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-12-15 20:02:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 9107 transitions. [2023-12-15 20:02:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-15 20:02:50,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:02:50,452 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:02:50,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 20:02:50,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:50,660 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:02:50,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:02:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash -249796249, now seen corresponding path program 1 times [2023-12-15 20:02:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:02:50,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499043354] [2023-12-15 20:02:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:50,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:02:50,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:02:50,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735446877] [2023-12-15 20:02:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:02:50,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:02:50,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:02:50,709 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:02:50,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 20:02:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:02:51,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-15 20:02:51,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:02:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 12194 proven. 408 refuted. 0 times theorem prover too weak. 9238 trivial. 0 not checked. [2023-12-15 20:02:52,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:02:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 210 proven. 411 refuted. 0 times theorem prover too weak. 21219 trivial. 0 not checked. [2023-12-15 20:02:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:02:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499043354] [2023-12-15 20:02:53,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:02:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735446877] [2023-12-15 20:02:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735446877] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:02:53,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:02:53,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2023-12-15 20:02:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500453063] [2023-12-15 20:02:53,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:02:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-15 20:02:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:02:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-15 20:02:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-12-15 20:02:53,371 INFO L87 Difference]: Start difference. First operand 5538 states and 9107 transitions. Second operand has 22 states, 22 states have (on average 12.5) internal successors, (275), 22 states have internal predecessors, (275), 4 states have call successors, (181), 3 states have call predecessors, (181), 7 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) [2023-12-15 20:02:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:02:59,755 INFO L93 Difference]: Finished difference Result 28248 states and 45981 transitions. [2023-12-15 20:02:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-12-15 20:02:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 12.5) internal successors, (275), 22 states have internal predecessors, (275), 4 states have call successors, (181), 3 states have call predecessors, (181), 7 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) Word has length 686 [2023-12-15 20:02:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:02:59,816 INFO L225 Difference]: With dead ends: 28248 [2023-12-15 20:02:59,816 INFO L226 Difference]: Without dead ends: 22711 [2023-12-15 20:02:59,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1459 GetRequests, 1362 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2194, Invalid=7312, Unknown=0, NotChecked=0, Total=9506 [2023-12-15 20:02:59,835 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 6946 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 1418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7032 SdHoareTripleChecker+Valid, 4876 SdHoareTripleChecker+Invalid, 5249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1418 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:02:59,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7032 Valid, 4876 Invalid, 5249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1418 Valid, 3831 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-15 20:02:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22711 states. [2023-12-15 20:03:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22711 to 4821. [2023-12-15 20:03:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4821 states, 3849 states have (on average 1.6224993504806444) internal successors, (6245), 3868 states have internal predecessors, (6245), 868 states have call successors, (868), 103 states have call predecessors, (868), 103 states have return successors, (868), 849 states have call predecessors, (868), 868 states have call successors, (868) [2023-12-15 20:03:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4821 states to 4821 states and 7981 transitions. [2023-12-15 20:03:00,706 INFO L78 Accepts]: Start accepts. Automaton has 4821 states and 7981 transitions. Word has length 686 [2023-12-15 20:03:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:03:00,707 INFO L495 AbstractCegarLoop]: Abstraction has 4821 states and 7981 transitions. [2023-12-15 20:03:00,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.5) internal successors, (275), 22 states have internal predecessors, (275), 4 states have call successors, (181), 3 states have call predecessors, (181), 7 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) [2023-12-15 20:03:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4821 states and 7981 transitions. [2023-12-15 20:03:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-15 20:03:00,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:03:00,718 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:03:00,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 20:03:00,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 20:03:00,927 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:03:00,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:03:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1136989161, now seen corresponding path program 1 times [2023-12-15 20:03:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:03:00,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895144826] [2023-12-15 20:03:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:03:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:03:00,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:03:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078003312] [2023-12-15 20:03:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:03:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:03:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:03:00,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:03:01,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 20:03:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:03:01,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-15 20:03:01,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:03:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 14760 proven. 558 refuted. 0 times theorem prover too weak. 6522 trivial. 0 not checked. [2023-12-15 20:03:03,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:03:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 654 proven. 576 refuted. 0 times theorem prover too weak. 20610 trivial. 0 not checked. [2023-12-15 20:03:06,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:03:06,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895144826] [2023-12-15 20:03:06,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:03:06,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078003312] [2023-12-15 20:03:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078003312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:03:06,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:03:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2023-12-15 20:03:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719205319] [2023-12-15 20:03:06,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:03:06,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-15 20:03:06,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:03:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-15 20:03:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2023-12-15 20:03:06,525 INFO L87 Difference]: Start difference. First operand 4821 states and 7981 transitions. Second operand has 32 states, 31 states have (on average 10.258064516129032) internal successors, (318), 30 states have internal predecessors, (318), 10 states have call successors, (210), 6 states have call predecessors, (210), 13 states have return successors, (210), 10 states have call predecessors, (210), 10 states have call successors, (210) Received shutdown request... [2023-12-15 20:03:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-15 20:03:09,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1409 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1240, Invalid=2666, Unknown=0, NotChecked=0, Total=3906 [2023-12-15 20:03:09,278 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 3937 mSDsluCounter, 5028 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3938 SdHoareTripleChecker+Valid, 5601 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-15 20:03:09,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3938 Valid, 5601 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-15 20:03:09,280 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 20:03:09,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 20:03:09,315 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 20:03:09,315 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 20:03:09,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-15 20:03:09,488 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (4821states) and FLOYD_HOARE automaton (currently 44 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-4-6-3-3-1 term,while SimplifyDDA2 was simplifying 4 xjuncts wrt. a ∧-3-6-3-3-1 context. [2023-12-15 20:03:09,493 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:03:09,495 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 20:03:09,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 08:03:09 BoogieIcfgContainer [2023-12-15 20:03:09,500 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 20:03:09,501 INFO L158 Benchmark]: Toolchain (without parser) took 51204.91ms. Allocated memory was 283.1MB in the beginning and 1.2GB in the end (delta: 966.8MB). Free memory was 229.5MB in the beginning and 739.9MB in the end (delta: -510.3MB). Peak memory consumption was 457.4MB. Max. memory is 8.0GB. [2023-12-15 20:03:09,502 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 184.5MB. Free memory was 132.6MB in the beginning and 132.4MB in the end (delta: 136.6kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 20:03:09,502 INFO L158 Benchmark]: CACSL2BoogieTranslator took 538.75ms. Allocated memory is still 283.1MB. Free memory was 229.5MB in the beginning and 196.6MB in the end (delta: 32.9MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. [2023-12-15 20:03:09,503 INFO L158 Benchmark]: Boogie Procedure Inliner took 161.54ms. Allocated memory is still 283.1MB. Free memory was 196.6MB in the beginning and 180.2MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-15 20:03:09,503 INFO L158 Benchmark]: Boogie Preprocessor took 169.56ms. Allocated memory is still 283.1MB. Free memory was 180.2MB in the beginning and 228.4MB in the end (delta: -48.2MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB. [2023-12-15 20:03:09,505 INFO L158 Benchmark]: RCFGBuilder took 1346.63ms. Allocated memory is still 283.1MB. Free memory was 228.4MB in the beginning and 124.1MB in the end (delta: 104.3MB). Peak memory consumption was 104.9MB. Max. memory is 8.0GB. [2023-12-15 20:03:09,505 INFO L158 Benchmark]: TraceAbstraction took 48982.20ms. Allocated memory was 283.1MB in the beginning and 1.2GB in the end (delta: 966.8MB). Free memory was 123.0MB in the beginning and 739.9MB in the end (delta: -616.8MB). Peak memory consumption was 349.9MB. Max. memory is 8.0GB. [2023-12-15 20:03:09,509 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 184.5MB. Free memory was 132.6MB in the beginning and 132.4MB in the end (delta: 136.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 538.75ms. Allocated memory is still 283.1MB. Free memory was 229.5MB in the beginning and 196.6MB in the end (delta: 32.9MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 161.54ms. Allocated memory is still 283.1MB. Free memory was 196.6MB in the beginning and 180.2MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 169.56ms. Allocated memory is still 283.1MB. Free memory was 180.2MB in the beginning and 228.4MB in the end (delta: -48.2MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB. * RCFGBuilder took 1346.63ms. Allocated memory is still 283.1MB. Free memory was 228.4MB in the beginning and 124.1MB in the end (delta: 104.3MB). Peak memory consumption was 104.9MB. Max. memory is 8.0GB. * TraceAbstraction took 48982.20ms. Allocated memory was 283.1MB in the beginning and 1.2GB in the end (delta: 966.8MB). Free memory was 123.0MB in the beginning and 739.9MB in the end (delta: -616.8MB). Peak memory consumption was 349.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was constructing difference of abstraction (4821states) and FLOYD_HOARE automaton (currently 44 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-4-6-3-3-1 term,while SimplifyDDA2 was simplifying 4 xjuncts wrt. a ∧-3-6-3-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 351 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.9s, OverallIterations: 16, TraceHistogramMax: 105, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 18.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22456 SdHoareTripleChecker+Valid, 10.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21980 mSDsluCounter, 34788 SdHoareTripleChecker+Invalid, 8.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24520 mSDsCounter, 3362 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13539 IncrementalHoareTripleChecker+Invalid, 16901 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3362 mSolverCounterUnsat, 10268 mSDtfsCounter, 13539 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16567 GetRequests, 16303 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5538occurred in iteration=14, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 25755 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 11621 NumberOfCodeBlocks, 11621 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 16392 ConstructedInterpolants, 0 QuantifiedInterpolants, 47778 SizeOfPredicates, 51 NumberOfNonLiveVariables, 25087 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 24 InterpolantComputations, 8 PerfectInterpolantSequences, 520371/524160 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown