/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-40.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:18:57,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:18:57,076 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 21:18:57,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:18:57,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:18:57,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:18:57,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:18:57,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:18:57,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:18:57,125 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:18:57,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:18:57,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:18:57,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:18:57,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:18:57,126 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:18:57,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:18:57,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:18:57,127 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:18:57,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:18:57,130 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:18:57,130 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:18:57,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:18:57,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:18:57,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:18:57,131 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:18:57,131 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:18:57,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:18:57,131 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:18:57,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:18:57,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:18:57,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:18:57,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:18:57,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:18:57,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:18:57,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:18:57,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:18:57,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:18:57,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:18:57,133 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:18:57,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:18:57,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:18:57,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:18:57,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:18:57,134 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:18:57,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:18:57,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:18:57,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:18:57,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:18:57,490 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:18:57,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-40.i [2023-12-15 21:18:58,738 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:18:58,963 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:18:58,963 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-40.i [2023-12-15 21:18:58,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f845d6e4d/3a28a65f7e824247b3d675fbca0cc054/FLAG967412ed7 [2023-12-15 21:18:58,989 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f845d6e4d/3a28a65f7e824247b3d675fbca0cc054 [2023-12-15 21:18:58,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:18:58,993 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:18:58,994 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:18:58,994 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:18:58,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:18:58,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:18:58" (1/1) ... [2023-12-15 21:18:58,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44aa4f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:58, skipping insertion in model container [2023-12-15 21:18:58,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:18:58" (1/1) ... [2023-12-15 21:18:59,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:18:59,206 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-40.i[916,929] [2023-12-15 21:18:59,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:18:59,412 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:18:59,424 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-40.i[916,929] [2023-12-15 21:18:59,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:18:59,588 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:18:59,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59 WrapperNode [2023-12-15 21:18:59,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:18:59,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:18:59,590 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:18:59,590 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:18:59,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,749 INFO L138 Inliner]: procedures = 26, calls = 77, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 783 [2023-12-15 21:18:59,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:18:59,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:18:59,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:18:59,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:18:59,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,778 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,896 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 21:18:59,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:18:59,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:19:00,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:19:00,014 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:19:00,042 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:19:00,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:19:00,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:19:00,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:19:00,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (1/1) ... [2023-12-15 21:19:00,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:19:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:00,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 21:19:00,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 21:19:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:19:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 21:19:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 21:19:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:19:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:19:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:19:00,207 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:19:00,210 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:19:01,249 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:19:01,272 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:19:01,273 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 21:19:01,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:19:01 BoogieIcfgContainer [2023-12-15 21:19:01,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:19:01,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:19:01,274 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:19:01,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:19:01,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:18:58" (1/3) ... [2023-12-15 21:19:01,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ed20c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:19:01, skipping insertion in model container [2023-12-15 21:19:01,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:18:59" (2/3) ... [2023-12-15 21:19:01,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ed20c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:19:01, skipping insertion in model container [2023-12-15 21:19:01,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:19:01" (3/3) ... [2023-12-15 21:19:01,278 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-40.i [2023-12-15 21:19:01,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:19:01,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:19:01,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:19:01,330 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;@61a89b31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:19:01,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:19:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 219 states have (on average 1.5936073059360731) internal successors, (349), 220 states have internal predecessors, (349), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-15 21:19:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-12-15 21:19:01,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:01,352 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:01,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:01,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1387562844, now seen corresponding path program 1 times [2023-12-15 21:19:01,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:01,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045391529] [2023-12-15 21:19:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045391529] [2023-12-15 21:19:01,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 21:19:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616606205] [2023-12-15 21:19:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:01,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:01,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:01,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 21:19:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:01,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 21:19:01,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2023-12-15 21:19:02,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616606205] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:02,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:02,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 21:19:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488299894] [2023-12-15 21:19:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 21:19:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:02,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 21:19:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:19:02,055 INFO L87 Difference]: Start difference. First operand has 286 states, 219 states have (on average 1.5936073059360731) internal successors, (349), 220 states have internal predecessors, (349), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Second operand has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) [2023-12-15 21:19:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:02,104 INFO L93 Difference]: Finished difference Result 569 states and 1016 transitions. [2023-12-15 21:19:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 21:19:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) Word has length 448 [2023-12-15 21:19:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:02,113 INFO L225 Difference]: With dead ends: 569 [2023-12-15 21:19:02,113 INFO L226 Difference]: Without dead ends: 284 [2023-12-15 21:19:02,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:19:02,135 INFO L413 NwaCegarLoop]: 469 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, 469 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:02,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 469 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:19:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-12-15 21:19:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2023-12-15 21:19:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 218 states have (on average 1.5779816513761469) internal successors, (344), 218 states have internal predecessors, (344), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-15 21:19:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 472 transitions. [2023-12-15 21:19:02,230 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 472 transitions. Word has length 448 [2023-12-15 21:19:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:02,231 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 472 transitions. [2023-12-15 21:19:02,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) [2023-12-15 21:19:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 472 transitions. [2023-12-15 21:19:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-12-15 21:19:02,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:02,238 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:02,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-15 21:19:02,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:02,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 582078692, now seen corresponding path program 1 times [2023-12-15 21:19:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:02,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924858839] [2023-12-15 21:19:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:02,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:02,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728517446] [2023-12-15 21:19:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:02,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:02,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:02,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 21:19:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:03,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:19:03,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:03,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:03,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:03,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924858839] [2023-12-15 21:19:03,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:03,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728517446] [2023-12-15 21:19:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728517446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:03,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:03,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:19:03,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259230606] [2023-12-15 21:19:03,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:03,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:19:03,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:19:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:19:03,155 INFO L87 Difference]: Start difference. First operand 284 states and 472 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:03,261 INFO L93 Difference]: Finished difference Result 793 states and 1318 transitions. [2023-12-15 21:19:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:19:03,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-12-15 21:19:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:03,268 INFO L225 Difference]: With dead ends: 793 [2023-12-15 21:19:03,268 INFO L226 Difference]: Without dead ends: 510 [2023-12-15 21:19:03,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:19:03,271 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 314 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:03,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1001 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:19:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-12-15 21:19:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 507. [2023-12-15 21:19:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 403 states have (on average 1.5930521091811414) internal successors, (642), 404 states have internal predecessors, (642), 101 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-15 21:19:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 844 transitions. [2023-12-15 21:19:03,321 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 844 transitions. Word has length 448 [2023-12-15 21:19:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:03,323 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 844 transitions. [2023-12-15 21:19:03,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 844 transitions. [2023-12-15 21:19:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-12-15 21:19:03,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:03,329 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:03,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-15 21:19:03,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:03,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1421112354, now seen corresponding path program 1 times [2023-12-15 21:19:03,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:03,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678740855] [2023-12-15 21:19:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:03,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:03,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162380076] [2023-12-15 21:19:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:03,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:03,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 21:19:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:03,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:19:03,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:04,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:04,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678740855] [2023-12-15 21:19:04,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162380076] [2023-12-15 21:19:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162380076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:04,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:19:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948563902] [2023-12-15 21:19:04,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:19:04,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:19:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:19:04,015 INFO L87 Difference]: Start difference. First operand 507 states and 844 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:04,380 INFO L93 Difference]: Finished difference Result 1289 states and 2136 transitions. [2023-12-15 21:19:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:19:04,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-12-15 21:19:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:04,388 INFO L225 Difference]: With dead ends: 1289 [2023-12-15 21:19:04,388 INFO L226 Difference]: Without dead ends: 783 [2023-12-15 21:19:04,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:04,391 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 831 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:04,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1329 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:19:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-12-15 21:19:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 527. [2023-12-15 21:19:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 460 states have (on average 1.6565217391304348) internal successors, (762), 460 states have internal predecessors, (762), 64 states have call successors, (64), 2 states have call predecessors, (64), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-15 21:19:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 890 transitions. [2023-12-15 21:19:04,428 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 890 transitions. Word has length 448 [2023-12-15 21:19:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:04,431 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 890 transitions. [2023-12-15 21:19:04,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 890 transitions. [2023-12-15 21:19:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-12-15 21:19:04,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:04,437 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:04,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:04,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:04,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:04,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash -185810334, now seen corresponding path program 1 times [2023-12-15 21:19:04,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:04,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308221988] [2023-12-15 21:19:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:04,718 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:04,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530643728] [2023-12-15 21:19:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:04,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:04,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:04,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:04,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 21:19:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:05,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:19:05,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:05,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308221988] [2023-12-15 21:19:05,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530643728] [2023-12-15 21:19:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530643728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:05,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:05,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:19:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237951358] [2023-12-15 21:19:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:05,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:19:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:19:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:05,154 INFO L87 Difference]: Start difference. First operand 527 states and 890 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:05,917 INFO L93 Difference]: Finished difference Result 1765 states and 2933 transitions. [2023-12-15 21:19:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:19:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-12-15 21:19:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:05,923 INFO L225 Difference]: With dead ends: 1765 [2023-12-15 21:19:05,923 INFO L226 Difference]: Without dead ends: 1233 [2023-12-15 21:19:05,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:19:05,925 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1935 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1935 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:05,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1935 Valid, 1982 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:19:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-12-15 21:19:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 543. [2023-12-15 21:19:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 476 states have (on average 1.638655462184874) internal successors, (780), 476 states have internal predecessors, (780), 64 states have call successors, (64), 2 states have call predecessors, (64), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-15 21:19:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 908 transitions. [2023-12-15 21:19:05,954 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 908 transitions. Word has length 448 [2023-12-15 21:19:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:05,955 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 908 transitions. [2023-12-15 21:19:05,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 908 transitions. [2023-12-15 21:19:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-12-15 21:19:05,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:05,959 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:05,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-15 21:19:06,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:06,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:06,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2108720862, now seen corresponding path program 1 times [2023-12-15 21:19:06,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:06,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24108676] [2023-12-15 21:19:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:06,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:06,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973128951] [2023-12-15 21:19:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:06,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:06,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:06,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:06,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 21:19:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:06,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:19:06,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:06,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:06,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:06,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24108676] [2023-12-15 21:19:06,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:06,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973128951] [2023-12-15 21:19:06,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973128951] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:06,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:06,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:19:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584568520] [2023-12-15 21:19:06,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:06,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:19:06,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:19:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:19:06,923 INFO L87 Difference]: Start difference. First operand 543 states and 908 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:07,176 INFO L93 Difference]: Finished difference Result 1627 states and 2722 transitions. [2023-12-15 21:19:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:19:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-12-15 21:19:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:07,181 INFO L225 Difference]: With dead ends: 1627 [2023-12-15 21:19:07,181 INFO L226 Difference]: Without dead ends: 1085 [2023-12-15 21:19:07,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 445 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 21:19:07,183 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 359 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:07,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1375 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:19:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2023-12-15 21:19:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1076. [2023-12-15 21:19:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 943 states have (on average 1.6362672322375398) internal successors, (1543), 943 states have internal predecessors, (1543), 128 states have call successors, (128), 4 states have call predecessors, (128), 4 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-12-15 21:19:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1799 transitions. [2023-12-15 21:19:07,279 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1799 transitions. Word has length 448 [2023-12-15 21:19:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:07,281 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1799 transitions. [2023-12-15 21:19:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1799 transitions. [2023-12-15 21:19:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-12-15 21:19:07,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:07,288 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:07,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 21:19:07,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:07,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:07,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1328312800, now seen corresponding path program 1 times [2023-12-15 21:19:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:07,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462464970] [2023-12-15 21:19:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:07,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:07,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:07,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360576408] [2023-12-15 21:19:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:07,555 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:07,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 21:19:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:07,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:19:07,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3913 proven. 114 refuted. 0 times theorem prover too weak. 4037 trivial. 0 not checked. [2023-12-15 21:19:08,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 75 proven. 114 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:08,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:08,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462464970] [2023-12-15 21:19:08,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360576408] [2023-12-15 21:19:08,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360576408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:08,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:08,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:19:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602389022] [2023-12-15 21:19:08,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:19:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:19:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:19:08,434 INFO L87 Difference]: Start difference. First operand 1076 states and 1799 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-12-15 21:19:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:08,743 INFO L93 Difference]: Finished difference Result 2147 states and 3571 transitions. [2023-12-15 21:19:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:19:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 448 [2023-12-15 21:19:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:08,758 INFO L225 Difference]: With dead ends: 2147 [2023-12-15 21:19:08,759 INFO L226 Difference]: Without dead ends: 1072 [2023-12-15 21:19:08,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 888 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:19:08,761 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 302 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:08,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 998 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:19:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-12-15 21:19:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1064. [2023-12-15 21:19:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 929 states have (on average 1.6027987082884823) internal successors, (1489), 929 states have internal predecessors, (1489), 128 states have call successors, (128), 6 states have call predecessors, (128), 6 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-12-15 21:19:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1745 transitions. [2023-12-15 21:19:08,804 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1745 transitions. Word has length 448 [2023-12-15 21:19:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:08,804 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1745 transitions. [2023-12-15 21:19:08,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-12-15 21:19:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1745 transitions. [2023-12-15 21:19:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-12-15 21:19:08,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:08,808 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:08,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:09,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:09,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:09,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1748249787, now seen corresponding path program 1 times [2023-12-15 21:19:09,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:09,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152196966] [2023-12-15 21:19:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:09,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:09,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159373619] [2023-12-15 21:19:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:09,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:09,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:09,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 21:19:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:09,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:19:09,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3985 proven. 78 refuted. 0 times theorem prover too weak. 4001 trivial. 0 not checked. [2023-12-15 21:19:09,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 111 proven. 78 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:09,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:09,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152196966] [2023-12-15 21:19:09,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:09,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159373619] [2023-12-15 21:19:09,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159373619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:09,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:09,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:19:09,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771493312] [2023-12-15 21:19:09,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:09,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:19:09,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:09,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:19:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:19:09,857 INFO L87 Difference]: Start difference. First operand 1064 states and 1745 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-12-15 21:19:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:10,282 INFO L93 Difference]: Finished difference Result 1933 states and 3147 transitions. [2023-12-15 21:19:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:19:10,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 449 [2023-12-15 21:19:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:10,287 INFO L225 Difference]: With dead ends: 1933 [2023-12-15 21:19:10,287 INFO L226 Difference]: Without dead ends: 870 [2023-12-15 21:19:10,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 890 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:19:10,290 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 948 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:10,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 1010 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:19:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-12-15 21:19:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 860. [2023-12-15 21:19:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 723 states have (on average 1.5670816044260027) internal successors, (1133), 723 states have internal predecessors, (1133), 128 states have call successors, (128), 8 states have call predecessors, (128), 8 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-12-15 21:19:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1389 transitions. [2023-12-15 21:19:10,341 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1389 transitions. Word has length 449 [2023-12-15 21:19:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:10,342 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 1389 transitions. [2023-12-15 21:19:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-12-15 21:19:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1389 transitions. [2023-12-15 21:19:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-12-15 21:19:10,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:10,346 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:10,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:10,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:10,554 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:10,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:10,554 INFO L85 PathProgramCache]: Analyzing trace with hash -735425120, now seen corresponding path program 1 times [2023-12-15 21:19:10,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:10,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419806001] [2023-12-15 21:19:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:10,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:10,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:10,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736447304] [2023-12-15 21:19:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:10,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:10,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 21:19:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:10,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:19:10,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:10,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:10,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:10,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419806001] [2023-12-15 21:19:10,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:10,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736447304] [2023-12-15 21:19:10,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736447304] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:10,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:19:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098476974] [2023-12-15 21:19:10,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:10,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:19:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:19:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:19:10,979 INFO L87 Difference]: Start difference. First operand 860 states and 1389 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:11,261 INFO L93 Difference]: Finished difference Result 1724 states and 2781 transitions. [2023-12-15 21:19:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:19:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 450 [2023-12-15 21:19:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:11,266 INFO L225 Difference]: With dead ends: 1724 [2023-12-15 21:19:11,267 INFO L226 Difference]: Without dead ends: 1289 [2023-12-15 21:19:11,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:11,268 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 653 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1172 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:19:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2023-12-15 21:19:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 854. [2023-12-15 21:19:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 717 states have (on average 1.5634588563458856) internal successors, (1121), 717 states have internal predecessors, (1121), 128 states have call successors, (128), 8 states have call predecessors, (128), 8 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-12-15 21:19:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1377 transitions. [2023-12-15 21:19:11,325 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1377 transitions. Word has length 450 [2023-12-15 21:19:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:11,325 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 1377 transitions. [2023-12-15 21:19:11,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1377 transitions. [2023-12-15 21:19:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-12-15 21:19:11,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:11,329 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:11,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-15 21:19:11,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:11,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash -134689340, now seen corresponding path program 1 times [2023-12-15 21:19:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074350396] [2023-12-15 21:19:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:11,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:11,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402818061] [2023-12-15 21:19:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:11,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:11,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:11,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 21:19:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:12,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:19:12,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:12,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:12,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:12,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074350396] [2023-12-15 21:19:12,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:12,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402818061] [2023-12-15 21:19:12,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402818061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:12,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:12,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:19:12,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55535975] [2023-12-15 21:19:12,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:12,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:19:12,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:12,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:19:12,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:12,147 INFO L87 Difference]: Start difference. First operand 854 states and 1377 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:12,521 INFO L93 Difference]: Finished difference Result 2566 states and 4110 transitions. [2023-12-15 21:19:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:19:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 451 [2023-12-15 21:19:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:12,527 INFO L225 Difference]: With dead ends: 2566 [2023-12-15 21:19:12,528 INFO L226 Difference]: Without dead ends: 1713 [2023-12-15 21:19:12,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:19:12,530 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 1359 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:12,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 2344 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:19:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2023-12-15 21:19:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1687. [2023-12-15 21:19:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1346 states have (on average 1.5222882615156017) internal successors, (2049), 1346 states have internal predecessors, (2049), 320 states have call successors, (320), 20 states have call predecessors, (320), 20 states have return successors, (320), 320 states have call predecessors, (320), 320 states have call successors, (320) [2023-12-15 21:19:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2689 transitions. [2023-12-15 21:19:12,622 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2689 transitions. Word has length 451 [2023-12-15 21:19:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:12,622 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2689 transitions. [2023-12-15 21:19:12,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2689 transitions. [2023-12-15 21:19:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-12-15 21:19:12,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:12,626 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:12,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 21:19:12,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:12,834 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:12,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2013820286, now seen corresponding path program 1 times [2023-12-15 21:19:12,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:12,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521700527] [2023-12-15 21:19:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:12,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:12,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:12,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734398868] [2023-12-15 21:19:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:12,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:12,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:12,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:12,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 21:19:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:13,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:19:13,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3589 proven. 60 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-12-15 21:19:13,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 129 proven. 60 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:14,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:14,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521700527] [2023-12-15 21:19:14,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:14,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734398868] [2023-12-15 21:19:14,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734398868] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:14,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:14,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-15 21:19:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267977807] [2023-12-15 21:19:14,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 21:19:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 21:19:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:19:14,096 INFO L87 Difference]: Start difference. First operand 1687 states and 2689 transitions. Second operand has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) [2023-12-15 21:19:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:15,384 INFO L93 Difference]: Finished difference Result 6019 states and 9576 transitions. [2023-12-15 21:19:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 21:19:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) Word has length 451 [2023-12-15 21:19:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:15,402 INFO L225 Difference]: With dead ends: 6019 [2023-12-15 21:19:15,402 INFO L226 Difference]: Without dead ends: 4456 [2023-12-15 21:19:15,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2023-12-15 21:19:15,408 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 2738 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2738 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 895 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:15,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2738 Valid, 2277 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [895 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 21:19:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2023-12-15 21:19:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4412. [2023-12-15 21:19:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 3606 states have (on average 1.5321686078757626) internal successors, (5525), 3610 states have internal predecessors, (5525), 748 states have call successors, (748), 57 states have call predecessors, (748), 57 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-12-15 21:19:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 7021 transitions. [2023-12-15 21:19:15,654 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 7021 transitions. Word has length 451 [2023-12-15 21:19:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:15,654 INFO L495 AbstractCegarLoop]: Abstraction has 4412 states and 7021 transitions. [2023-12-15 21:19:15,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) [2023-12-15 21:19:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 7021 transitions. [2023-12-15 21:19:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-12-15 21:19:15,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:15,658 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:15,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-15 21:19:15,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 21:19:15,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:15,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1908882199, now seen corresponding path program 1 times [2023-12-15 21:19:15,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:15,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010667387] [2023-12-15 21:19:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:15,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:15,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:15,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735500701] [2023-12-15 21:19:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:15,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:15,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:15,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:15,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 21:19:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:16,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-15 21:19:16,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3892 proven. 183 refuted. 0 times theorem prover too weak. 3989 trivial. 0 not checked. [2023-12-15 21:19:17,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:17,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:17,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010667387] [2023-12-15 21:19:17,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735500701] [2023-12-15 21:19:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735500701] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 21:19:17,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 21:19:17,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 17 [2023-12-15 21:19:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257649810] [2023-12-15 21:19:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:17,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:19:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:19:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-12-15 21:19:17,439 INFO L87 Difference]: Start difference. First operand 4412 states and 7021 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:18,137 INFO L93 Difference]: Finished difference Result 13043 states and 20694 transitions. [2023-12-15 21:19:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:19:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 452 [2023-12-15 21:19:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:18,168 INFO L225 Difference]: With dead ends: 13043 [2023-12-15 21:19:18,169 INFO L226 Difference]: Without dead ends: 8767 [2023-12-15 21:19:18,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-12-15 21:19:18,180 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1432 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:18,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1432 Valid, 1078 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:19:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8767 states. [2023-12-15 21:19:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8767 to 5658. [2023-12-15 21:19:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 4839 states have (on average 1.5546600537301096) internal successors, (7523), 4843 states have internal predecessors, (7523), 748 states have call successors, (748), 70 states have call predecessors, (748), 70 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-12-15 21:19:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 9019 transitions. [2023-12-15 21:19:18,608 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 9019 transitions. Word has length 452 [2023-12-15 21:19:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:18,608 INFO L495 AbstractCegarLoop]: Abstraction has 5658 states and 9019 transitions. [2023-12-15 21:19:18,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 9019 transitions. [2023-12-15 21:19:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-12-15 21:19:18,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:18,613 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:18,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-15 21:19:18,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 21:19:18,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:18,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1492598759, now seen corresponding path program 1 times [2023-12-15 21:19:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996632218] [2023-12-15 21:19:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:18,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271583390] [2023-12-15 21:19:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:18,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:18,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:18,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 21:19:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:19:19,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3789 proven. 120 refuted. 0 times theorem prover too weak. 4155 trivial. 0 not checked. [2023-12-15 21:19:19,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 69 proven. 120 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:19,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996632218] [2023-12-15 21:19:19,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:19,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271583390] [2023-12-15 21:19:19,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271583390] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:19,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:19,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-15 21:19:19,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002403731] [2023-12-15 21:19:19,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:19,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 21:19:19,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:19,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 21:19:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-15 21:19:19,989 INFO L87 Difference]: Start difference. First operand 5658 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-12-15 21:19:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:20,629 INFO L93 Difference]: Finished difference Result 11196 states and 17799 transitions. [2023-12-15 21:19:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:19:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 452 [2023-12-15 21:19:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:20,649 INFO L225 Difference]: With dead ends: 11196 [2023-12-15 21:19:20,649 INFO L226 Difference]: Without dead ends: 5678 [2023-12-15 21:19:20,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-12-15 21:19:20,660 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 500 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:20,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1322 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:19:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2023-12-15 21:19:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5626. [2023-12-15 21:19:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 4794 states have (on average 1.5423445974134335) internal successors, (7394), 4798 states have internal predecessors, (7394), 748 states have call successors, (748), 83 states have call predecessors, (748), 83 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-12-15 21:19:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 8890 transitions. [2023-12-15 21:19:20,926 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 8890 transitions. Word has length 452 [2023-12-15 21:19:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:20,926 INFO L495 AbstractCegarLoop]: Abstraction has 5626 states and 8890 transitions. [2023-12-15 21:19:20,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-12-15 21:19:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 8890 transitions. [2023-12-15 21:19:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-12-15 21:19:20,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:20,931 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:20,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:21,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-15 21:19:21,145 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:21,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -752151079, now seen corresponding path program 1 times [2023-12-15 21:19:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:21,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479277226] [2023-12-15 21:19:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:21,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:21,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:21,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468071596] [2023-12-15 21:19:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:21,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:21,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:21,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:21,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 21:19:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:21,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:19:21,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:21,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:21,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:21,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479277226] [2023-12-15 21:19:21,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:21,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468071596] [2023-12-15 21:19:21,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468071596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:21,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:21,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:19:21,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169271898] [2023-12-15 21:19:21,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:21,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:19:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:21,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:19:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:21,710 INFO L87 Difference]: Start difference. First operand 5626 states and 8890 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:22,245 INFO L93 Difference]: Finished difference Result 13585 states and 21497 transitions. [2023-12-15 21:19:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:19:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 452 [2023-12-15 21:19:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:22,269 INFO L225 Difference]: With dead ends: 13585 [2023-12-15 21:19:22,269 INFO L226 Difference]: Without dead ends: 8103 [2023-12-15 21:19:22,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:19:22,281 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1338 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:22,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1338 Valid, 2845 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:19:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2023-12-15 21:19:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5608. [2023-12-15 21:19:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 4776 states have (on average 1.5435510887772195) internal successors, (7372), 4780 states have internal predecessors, (7372), 748 states have call successors, (748), 83 states have call predecessors, (748), 83 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-12-15 21:19:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 8868 transitions. [2023-12-15 21:19:22,649 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 8868 transitions. Word has length 452 [2023-12-15 21:19:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:22,650 INFO L495 AbstractCegarLoop]: Abstraction has 5608 states and 8868 transitions. [2023-12-15 21:19:22,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 8868 transitions. [2023-12-15 21:19:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-12-15 21:19:22,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:22,654 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:22,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 21:19:22,862 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:22,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash 572705115, now seen corresponding path program 1 times [2023-12-15 21:19:22,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:22,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111260688] [2023-12-15 21:19:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:22,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:22,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:22,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58988452] [2023-12-15 21:19:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:22,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:22,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:22,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:22,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 21:19:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:23,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:19:23,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:23,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:23,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:23,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111260688] [2023-12-15 21:19:23,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:23,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58988452] [2023-12-15 21:19:23,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58988452] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:23,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:23,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:19:23,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785275752] [2023-12-15 21:19:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:19:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:19:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:19:23,340 INFO L87 Difference]: Start difference. First operand 5608 states and 8868 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:23,822 INFO L93 Difference]: Finished difference Result 12143 states and 19233 transitions. [2023-12-15 21:19:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:19:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 452 [2023-12-15 21:19:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:23,834 INFO L225 Difference]: With dead ends: 12143 [2023-12-15 21:19:23,834 INFO L226 Difference]: Without dead ends: 6349 [2023-12-15 21:19:23,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:23,840 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 341 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:23,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1760 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:19:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6349 states. [2023-12-15 21:19:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6349 to 5604. [2023-12-15 21:19:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 4772 states have (on average 1.5431684828164292) internal successors, (7364), 4776 states have internal predecessors, (7364), 748 states have call successors, (748), 83 states have call predecessors, (748), 83 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-12-15 21:19:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8860 transitions. [2023-12-15 21:19:24,124 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8860 transitions. Word has length 452 [2023-12-15 21:19:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:24,125 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8860 transitions. [2023-12-15 21:19:24,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8860 transitions. [2023-12-15 21:19:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:24,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:24,130 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:24,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:24,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:24,355 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:24,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:24,355 INFO L85 PathProgramCache]: Analyzing trace with hash -822286797, now seen corresponding path program 1 times [2023-12-15 21:19:24,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:24,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608266946] [2023-12-15 21:19:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:24,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:24,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279732925] [2023-12-15 21:19:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:24,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:24,408 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:24,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 21:19:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:24,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:19:24,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 673 proven. 6 refuted. 0 times theorem prover too weak. 7385 trivial. 0 not checked. [2023-12-15 21:19:24,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 183 proven. 6 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608266946] [2023-12-15 21:19:25,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279732925] [2023-12-15 21:19:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279732925] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:25,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 21:19:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945072594] [2023-12-15 21:19:25,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:19:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:19:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:19:25,067 INFO L87 Difference]: Start difference. First operand 5604 states and 8860 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-12-15 21:19:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:25,957 INFO L93 Difference]: Finished difference Result 9668 states and 15215 transitions. [2023-12-15 21:19:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 21:19:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) Word has length 453 [2023-12-15 21:19:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:25,985 INFO L225 Difference]: With dead ends: 9668 [2023-12-15 21:19:25,986 INFO L226 Difference]: Without dead ends: 4208 [2023-12-15 21:19:25,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 897 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-15 21:19:25,995 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 1371 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:25,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1433 Valid, 1796 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:19:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2023-12-15 21:19:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 4145. [2023-12-15 21:19:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 3496 states have (on average 1.5243135011441649) internal successors, (5329), 3499 states have internal predecessors, (5329), 577 states have call successors, (577), 71 states have call predecessors, (577), 71 states have return successors, (577), 574 states have call predecessors, (577), 577 states have call successors, (577) [2023-12-15 21:19:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 6483 transitions. [2023-12-15 21:19:26,200 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 6483 transitions. Word has length 453 [2023-12-15 21:19:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:26,201 INFO L495 AbstractCegarLoop]: Abstraction has 4145 states and 6483 transitions. [2023-12-15 21:19:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-12-15 21:19:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 6483 transitions. [2023-12-15 21:19:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:26,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:26,204 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:26,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 21:19:26,413 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:26,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1152057399, now seen corresponding path program 1 times [2023-12-15 21:19:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404650414] [2023-12-15 21:19:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:26,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:26,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486491732] [2023-12-15 21:19:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:26,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:26,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:26,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 21:19:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:26,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:19:26,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:26,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:26,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:26,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404650414] [2023-12-15 21:19:26,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:26,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486491732] [2023-12-15 21:19:26,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486491732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:26,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:26,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:19:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499229187] [2023-12-15 21:19:26,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:26,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:19:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:26,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:19:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:19:26,965 INFO L87 Difference]: Start difference. First operand 4145 states and 6483 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:27,251 INFO L93 Difference]: Finished difference Result 6021 states and 9396 transitions. [2023-12-15 21:19:27,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:19:27,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-12-15 21:19:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:27,257 INFO L225 Difference]: With dead ends: 6021 [2023-12-15 21:19:27,257 INFO L226 Difference]: Without dead ends: 1859 [2023-12-15 21:19:27,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:19:27,263 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 339 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:27,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1237 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:19:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-12-15 21:19:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 972. [2023-12-15 21:19:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 779 states have (on average 1.4736842105263157) internal successors, (1148), 780 states have internal predecessors, (1148), 171 states have call successors, (171), 21 states have call predecessors, (171), 21 states have return successors, (171), 170 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-15 21:19:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1490 transitions. [2023-12-15 21:19:27,334 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1490 transitions. Word has length 453 [2023-12-15 21:19:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:27,335 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1490 transitions. [2023-12-15 21:19:27,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1490 transitions. [2023-12-15 21:19:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:27,337 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:27,337 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:27,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:27,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-15 21:19:27,546 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:27,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:27,546 INFO L85 PathProgramCache]: Analyzing trace with hash 133318935, now seen corresponding path program 1 times [2023-12-15 21:19:27,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:27,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588408411] [2023-12-15 21:19:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:27,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:27,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268407110] [2023-12-15 21:19:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:27,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:27,588 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:27,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 21:19:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:28,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:19:28,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:28,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:28,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:28,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588408411] [2023-12-15 21:19:28,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:28,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268407110] [2023-12-15 21:19:28,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268407110] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:28,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:28,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:19:28,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627191820] [2023-12-15 21:19:28,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:28,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:19:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:19:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:19:28,559 INFO L87 Difference]: Start difference. First operand 972 states and 1490 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:29,441 INFO L93 Difference]: Finished difference Result 3959 states and 6047 transitions. [2023-12-15 21:19:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:19:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-12-15 21:19:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:29,464 INFO L225 Difference]: With dead ends: 3959 [2023-12-15 21:19:29,465 INFO L226 Difference]: Without dead ends: 2988 [2023-12-15 21:19:29,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-15 21:19:29,467 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1178 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:29,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 1973 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:19:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2023-12-15 21:19:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1947. [2023-12-15 21:19:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1562 states have (on average 1.47247119078105) internal successors, (2300), 1564 states have internal predecessors, (2300), 342 states have call successors, (342), 42 states have call predecessors, (342), 42 states have return successors, (342), 340 states have call predecessors, (342), 342 states have call successors, (342) [2023-12-15 21:19:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2984 transitions. [2023-12-15 21:19:29,763 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2984 transitions. Word has length 453 [2023-12-15 21:19:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:29,763 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2984 transitions. [2023-12-15 21:19:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2984 transitions. [2023-12-15 21:19:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:29,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:29,767 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:29,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-15 21:19:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-15 21:19:29,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:29,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1829618395, now seen corresponding path program 1 times [2023-12-15 21:19:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772980246] [2023-12-15 21:19:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:30,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392776425] [2023-12-15 21:19:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:30,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:30,035 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:30,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 21:19:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:30,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:19:30,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3823 proven. 69 refuted. 0 times theorem prover too weak. 4172 trivial. 0 not checked. [2023-12-15 21:19:30,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 120 proven. 69 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:30,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:30,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772980246] [2023-12-15 21:19:30,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:30,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392776425] [2023-12-15 21:19:30,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392776425] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:30,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:30,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 21:19:30,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057332476] [2023-12-15 21:19:30,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:19:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:19:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:19:30,965 INFO L87 Difference]: Start difference. First operand 1947 states and 2984 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-12-15 21:19:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:31,549 INFO L93 Difference]: Finished difference Result 3651 states and 5491 transitions. [2023-12-15 21:19:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 21:19:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 453 [2023-12-15 21:19:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:31,554 INFO L225 Difference]: With dead ends: 3651 [2023-12-15 21:19:31,554 INFO L226 Difference]: Without dead ends: 1705 [2023-12-15 21:19:31,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 897 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-12-15 21:19:31,557 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1024 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:31,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 895 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:19:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2023-12-15 21:19:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1641. [2023-12-15 21:19:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1250 states have (on average 1.3984) internal successors, (1748), 1252 states have internal predecessors, (1748), 342 states have call successors, (342), 48 states have call predecessors, (342), 48 states have return successors, (342), 340 states have call predecessors, (342), 342 states have call successors, (342) [2023-12-15 21:19:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2432 transitions. [2023-12-15 21:19:31,813 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2432 transitions. Word has length 453 [2023-12-15 21:19:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:31,813 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 2432 transitions. [2023-12-15 21:19:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-12-15 21:19:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2432 transitions. [2023-12-15 21:19:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:31,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:31,816 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:31,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 21:19:32,025 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:32,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash -219769447, now seen corresponding path program 1 times [2023-12-15 21:19:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170910780] [2023-12-15 21:19:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:32,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776405277] [2023-12-15 21:19:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:32,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:32,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:32,062 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:32,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 21:19:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:32,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-15 21:19:32,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3824 proven. 414 refuted. 0 times theorem prover too weak. 3826 trivial. 0 not checked. [2023-12-15 21:19:34,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 69 proven. 120 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-12-15 21:19:35,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:35,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170910780] [2023-12-15 21:19:35,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:35,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776405277] [2023-12-15 21:19:35,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776405277] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:19:35,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:19:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2023-12-15 21:19:35,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463050377] [2023-12-15 21:19:35,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:19:35,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 21:19:35,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 21:19:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-12-15 21:19:35,266 INFO L87 Difference]: Start difference. First operand 1641 states and 2432 transitions. Second operand has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 23 states have internal predecessors, (242), 6 states have call successors, (128), 5 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 6 states have call successors, (128) [2023-12-15 21:19:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:42,565 INFO L93 Difference]: Finished difference Result 8934 states and 13527 transitions. [2023-12-15 21:19:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-12-15 21:19:42,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 23 states have internal predecessors, (242), 6 states have call successors, (128), 5 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 6 states have call successors, (128) Word has length 453 [2023-12-15 21:19:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:42,577 INFO L225 Difference]: With dead ends: 8934 [2023-12-15 21:19:42,577 INFO L226 Difference]: Without dead ends: 7294 [2023-12-15 21:19:42,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4478 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1940, Invalid=10492, Unknown=0, NotChecked=0, Total=12432 [2023-12-15 21:19:42,585 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 5404 mSDsluCounter, 7929 mSDsCounter, 0 mSdLazyCounter, 5647 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5407 SdHoareTripleChecker+Valid, 8609 SdHoareTripleChecker+Invalid, 6480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 5647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:42,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5407 Valid, 8609 Invalid, 6480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 5647 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-15 21:19:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2023-12-15 21:19:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 2264. [2023-12-15 21:19:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 1795 states have (on average 1.426183844011142) internal successors, (2560), 1800 states have internal predecessors, (2560), 411 states have call successors, (411), 57 states have call predecessors, (411), 57 states have return successors, (411), 406 states have call predecessors, (411), 411 states have call successors, (411) [2023-12-15 21:19:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3382 transitions. [2023-12-15 21:19:42,868 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3382 transitions. Word has length 453 [2023-12-15 21:19:42,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:42,869 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3382 transitions. [2023-12-15 21:19:42,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 23 states have internal predecessors, (242), 6 states have call successors, (128), 5 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 6 states have call successors, (128) [2023-12-15 21:19:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3382 transitions. [2023-12-15 21:19:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:42,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:42,872 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:42,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:43,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:43,093 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:43,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash 734170711, now seen corresponding path program 1 times [2023-12-15 21:19:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:43,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101837478] [2023-12-15 21:19:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:43,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:43,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671413156] [2023-12-15 21:19:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:43,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:43,131 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:43,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-15 21:19:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:43,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-15 21:19:43,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:44,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:19:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101837478] [2023-12-15 21:19:44,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671413156] [2023-12-15 21:19:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671413156] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:19:44,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:19:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:19:44,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090259786] [2023-12-15 21:19:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:44,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:19:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:19:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:19:44,045 INFO L87 Difference]: Start difference. First operand 2264 states and 3382 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:19:45,083 INFO L93 Difference]: Finished difference Result 5558 states and 8256 transitions. [2023-12-15 21:19:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:19:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-12-15 21:19:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:19:45,107 INFO L225 Difference]: With dead ends: 5558 [2023-12-15 21:19:45,108 INFO L226 Difference]: Without dead ends: 3295 [2023-12-15 21:19:45,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:19:45,112 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 1227 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2493 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:19:45,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 2493 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 21:19:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2023-12-15 21:19:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2264. [2023-12-15 21:19:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 1795 states have (on average 1.426183844011142) internal successors, (2560), 1800 states have internal predecessors, (2560), 411 states have call successors, (411), 57 states have call predecessors, (411), 57 states have return successors, (411), 406 states have call predecessors, (411), 411 states have call successors, (411) [2023-12-15 21:19:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3382 transitions. [2023-12-15 21:19:45,446 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3382 transitions. Word has length 453 [2023-12-15 21:19:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:19:45,446 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3382 transitions. [2023-12-15 21:19:45,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-12-15 21:19:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3382 transitions. [2023-12-15 21:19:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-15 21:19:45,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:19:45,449 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:19:45,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-15 21:19:45,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:45,658 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:19:45,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:19:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash -451080937, now seen corresponding path program 1 times [2023-12-15 21:19:45,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:19:45,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427286620] [2023-12-15 21:19:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:45,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:19:45,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:19:45,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532931114] [2023-12-15 21:19:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:19:45,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:19:45,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:45,697 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:19:45,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-15 21:19:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:19:46,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-15 21:19:46,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:19:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4371 proven. 258 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2023-12-15 21:19:47,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:19:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-12-15 21:19:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:19:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427286620] [2023-12-15 21:19:50,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:19:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532931114] [2023-12-15 21:19:50,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532931114] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 21:19:50,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 21:19:50,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [17] total 34 [2023-12-15 21:19:50,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584304167] [2023-12-15 21:19:50,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:19:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-15 21:19:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:19:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-15 21:19:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2023-12-15 21:19:50,794 INFO L87 Difference]: Start difference. First operand 2264 states and 3382 transitions. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 2 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Received shutdown request... [2023-12-15 21:20:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-15 21:20:00,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 873 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=931, Invalid=4181, Unknown=0, NotChecked=0, Total=5112 [2023-12-15 21:20:00,311 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1341 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:00,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 1115 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-15 21:20:00,312 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:20:00,320 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:20:00,320 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:20:00,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-15 21:20:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:00,513 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (2264states) and FLOYD_HOARE automaton (currently 40 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-9-5-4-5-2-3-1 term,while SimplifyDDA2 was simplifying 2 xjuncts wrt. a ∨-2-1 context. [2023-12-15 21:20:00,518 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:20:00,531 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:20:00,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:20:00 BoogieIcfgContainer [2023-12-15 21:20:00,532 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:20:00,533 INFO L158 Benchmark]: Toolchain (without parser) took 61539.37ms. Allocated memory was 353.4MB in the beginning and 1.3GB in the end (delta: 907.0MB). Free memory was 297.3MB in the beginning and 541.5MB in the end (delta: -244.2MB). Peak memory consumption was 663.8MB. Max. memory is 8.0GB. [2023-12-15 21:20:00,533 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 209.7MB. Free memory is still 157.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:20:00,533 INFO L158 Benchmark]: CACSL2BoogieTranslator took 594.53ms. Allocated memory is still 353.4MB. Free memory was 297.3MB in the beginning and 256.4MB in the end (delta: 40.9MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2023-12-15 21:20:00,533 INFO L158 Benchmark]: Boogie Procedure Inliner took 161.41ms. Allocated memory is still 353.4MB. Free memory was 256.4MB in the beginning and 231.7MB in the end (delta: 24.6MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-12-15 21:20:00,534 INFO L158 Benchmark]: Boogie Preprocessor took 291.30ms. Allocated memory is still 353.4MB. Free memory was 231.7MB in the beginning and 298.8MB in the end (delta: -67.0MB). Peak memory consumption was 39.4MB. Max. memory is 8.0GB. [2023-12-15 21:20:00,534 INFO L158 Benchmark]: RCFGBuilder took 1229.51ms. Allocated memory is still 353.4MB. Free memory was 298.8MB in the beginning and 273.3MB in the end (delta: 25.4MB). Peak memory consumption was 104.9MB. Max. memory is 8.0GB. [2023-12-15 21:20:00,534 INFO L158 Benchmark]: TraceAbstraction took 59258.10ms. Allocated memory was 353.4MB in the beginning and 1.3GB in the end (delta: 907.0MB). Free memory was 272.8MB in the beginning and 541.5MB in the end (delta: -268.7MB). Peak memory consumption was 638.9MB. Max. memory is 8.0GB. [2023-12-15 21:20:00,535 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 209.7MB. Free memory is still 157.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 594.53ms. Allocated memory is still 353.4MB. Free memory was 297.3MB in the beginning and 256.4MB in the end (delta: 40.9MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 161.41ms. Allocated memory is still 353.4MB. Free memory was 256.4MB in the beginning and 231.7MB in the end (delta: 24.6MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 291.30ms. Allocated memory is still 353.4MB. Free memory was 231.7MB in the beginning and 298.8MB in the end (delta: -67.0MB). Peak memory consumption was 39.4MB. Max. memory is 8.0GB. * RCFGBuilder took 1229.51ms. Allocated memory is still 353.4MB. Free memory was 298.8MB in the beginning and 273.3MB in the end (delta: 25.4MB). Peak memory consumption was 104.9MB. Max. memory is 8.0GB. * TraceAbstraction took 59258.10ms. Allocated memory was 353.4MB in the beginning and 1.3GB in the end (delta: 907.0MB). Free memory was 272.8MB in the beginning and 541.5MB in the end (delta: -268.7MB). Peak memory consumption was 638.9MB. 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 (2264states) and FLOYD_HOARE automaton (currently 40 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-9-5-4-5-2-3-1 term,while SimplifyDDA2 was simplifying 2 xjuncts wrt. a ∨-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 286 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.2s, OverallIterations: 21, TraceHistogramMax: 64, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 27.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25086 SdHoareTripleChecker+Valid, 13.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24934 mSDsluCounter, 39080 SdHoareTripleChecker+Invalid, 11.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27528 mSDsCounter, 4973 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13134 IncrementalHoareTripleChecker+Invalid, 18107 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4973 mSolverCounterUnsat, 11552 mSDtfsCounter, 13134 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13715 GetRequests, 13379 SyntacticMatches, 7 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6377 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5658occurred in iteration=11, InterpolantAutomatonStates: 240, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 15998 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 9916 NumberOfCodeBlocks, 9916 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 13502 ConstructedInterpolants, 0 QuantifiedInterpolants, 43486 SizeOfPredicates, 84 NumberOfNonLiveVariables, 23665 ConjunctsInSsa, 209 ConjunctsInUnsatCore, 30 InterpolantComputations, 14 PerfectInterpolantSequences, 240051/241920 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