/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-49.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:19:56,933 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:19:56,999 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 21:19:57,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:19:57,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:19:57,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:19:57,025 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:19:57,025 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:19:57,025 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:19:57,029 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:19:57,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:19:57,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:19:57,030 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:19:57,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:19:57,031 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:19:57,031 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:19:57,031 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:19:57,031 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:19:57,032 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:19:57,032 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:19:57,032 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:19:57,033 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:19:57,033 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:19:57,033 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:19:57,033 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:19:57,033 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:19:57,034 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:19:57,034 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:19:57,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:19:57,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:19:57,035 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:19:57,035 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:19:57,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:19:57,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:19:57,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:19:57,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:19:57,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:19:57,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:19:57,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:19:57,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:19:57,259 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:19:57,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-49.i [2023-12-15 21:19:58,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:19:58,450 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:19:58,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-49.i [2023-12-15 21:19:58,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1627a71c1/f413abbd40994f12b3e824b833380f8c/FLAG9f315a306 [2023-12-15 21:19:58,469 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1627a71c1/f413abbd40994f12b3e824b833380f8c [2023-12-15 21:19:58,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:19:58,474 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:19:58,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:19:58,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:19:58,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:19:58,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:58,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7055da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58, skipping insertion in model container [2023-12-15 21:19:58,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:58,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:19:58,624 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-49.i[916,929] [2023-12-15 21:19:58,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:19:58,845 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:19:58,852 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-49.i[916,929] [2023-12-15 21:19:58,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:19:58,949 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:19:58,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58 WrapperNode [2023-12-15 21:19:58,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:19:58,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:19:58,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:19:58,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:19:58,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:58,983 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,064 INFO L138 Inliner]: procedures = 26, calls = 104, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 796 [2023-12-15 21:19:59,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:19:59,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:19:59,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:19:59,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:19:59,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,097 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,149 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 21:19:59,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:19:59,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:19:59,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:19:59,241 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:19:59,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (1/1) ... [2023-12-15 21:19:59,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:19:59,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:19:59,262 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 21:19:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:19:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 21:19:59,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 21:19:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:19:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:19:59,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:19:59,282 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 21:19:59,418 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:19:59,419 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:20:00,269 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:20:00,317 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:20:00,317 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 21:20:00,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:20:00 BoogieIcfgContainer [2023-12-15 21:20:00,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:20:00,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:20:00,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:20:00,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:20:00,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:19:58" (1/3) ... [2023-12-15 21:20:00,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:20:00, skipping insertion in model container [2023-12-15 21:20:00,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:19:58" (2/3) ... [2023-12-15 21:20:00,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:20:00, skipping insertion in model container [2023-12-15 21:20:00,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:20:00" (3/3) ... [2023-12-15 21:20:00,323 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-49.i [2023-12-15 21:20:00,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:20:00,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:20:00,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:20:00,389 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;@688f2449, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:20:00,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:20:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 298 states, 204 states have (on average 1.5490196078431373) internal successors, (316), 205 states have internal predecessors, (316), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-12-15 21:20:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-15 21:20:00,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:00,429 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:00,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:00,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash 993000333, now seen corresponding path program 1 times [2023-12-15 21:20:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898761185] [2023-12-15 21:20:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:00,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:00,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898761185] [2023-12-15 21:20:00,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 21:20:00,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831910] [2023-12-15 21:20:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:00,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:00,803 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 21:20:00,824 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 21:20:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:01,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 21:20:01,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2023-12-15 21:20:01,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:01,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831910] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:01,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:01,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 21:20:01,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499799459] [2023-12-15 21:20:01,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:01,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 21:20:01,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 21:20:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:20:01,288 INFO L87 Difference]: Start difference. First operand has 298 states, 204 states have (on average 1.5490196078431373) internal successors, (316), 205 states have internal predecessors, (316), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-12-15 21:20:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:01,341 INFO L93 Difference]: Finished difference Result 590 states and 1079 transitions. [2023-12-15 21:20:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 21:20:01,345 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) Word has length 592 [2023-12-15 21:20:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:01,354 INFO L225 Difference]: With dead ends: 590 [2023-12-15 21:20:01,354 INFO L226 Difference]: Without dead ends: 293 [2023-12-15 21:20:01,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 591 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 21:20:01,366 INFO L413 NwaCegarLoop]: 481 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, 481 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 21:20:01,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 481 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:20:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-12-15 21:20:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2023-12-15 21:20:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 200 states have (on average 1.51) internal successors, (302), 200 states have internal predecessors, (302), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-12-15 21:20:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 484 transitions. [2023-12-15 21:20:01,432 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 484 transitions. Word has length 592 [2023-12-15 21:20:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:01,432 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 484 transitions. [2023-12-15 21:20:01,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-12-15 21:20:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 484 transitions. [2023-12-15 21:20:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-15 21:20:01,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:01,442 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:01,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 21:20:01,652 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 21:20:01,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:01,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 447584335, now seen corresponding path program 1 times [2023-12-15 21:20:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:01,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273220764] [2023-12-15 21:20:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:01,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:01,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472919118] [2023-12-15 21:20:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:01,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:01,757 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 21:20:01,758 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 21:20:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:02,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:20:02,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:02,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273220764] [2023-12-15 21:20:02,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472919118] [2023-12-15 21:20:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472919118] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:02,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:20:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448643123] [2023-12-15 21:20:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:02,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:20:02,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:20:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:20:02,234 INFO L87 Difference]: Start difference. First operand 293 states and 484 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:02,452 INFO L93 Difference]: Finished difference Result 867 states and 1430 transitions. [2023-12-15 21:20:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:20:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 592 [2023-12-15 21:20:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:02,463 INFO L225 Difference]: With dead ends: 867 [2023-12-15 21:20:02,464 INFO L226 Difference]: Without dead ends: 575 [2023-12-15 21:20:02,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 590 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 21:20:02,469 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 422 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:02,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 926 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:20:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-12-15 21:20:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 360. [2023-12-15 21:20:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 267 states have (on average 1.550561797752809) internal successors, (414), 267 states have internal predecessors, (414), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-12-15 21:20:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 596 transitions. [2023-12-15 21:20:02,513 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 596 transitions. Word has length 592 [2023-12-15 21:20:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:02,516 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 596 transitions. [2023-12-15 21:20:02,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 596 transitions. [2023-12-15 21:20:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-15 21:20:02,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:02,526 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:02,534 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 21:20:02,734 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 21:20:02,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:02,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:02,735 INFO L85 PathProgramCache]: Analyzing trace with hash -955324945, now seen corresponding path program 1 times [2023-12-15 21:20:02,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:02,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925941463] [2023-12-15 21:20:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:02,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:02,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667642815] [2023-12-15 21:20:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:02,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:02,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:02,810 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 21:20:02,839 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 21:20:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:03,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:20:03,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:03,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925941463] [2023-12-15 21:20:03,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667642815] [2023-12-15 21:20:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667642815] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:03,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:03,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:20:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910542046] [2023-12-15 21:20:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:20:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:20:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:20:03,215 INFO L87 Difference]: Start difference. First operand 360 states and 596 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:03,301 INFO L93 Difference]: Finished difference Result 1077 states and 1784 transitions. [2023-12-15 21:20:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:20:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 592 [2023-12-15 21:20:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:03,309 INFO L225 Difference]: With dead ends: 1077 [2023-12-15 21:20:03,309 INFO L226 Difference]: Without dead ends: 718 [2023-12-15 21:20:03,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 590 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 21:20:03,311 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 469 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:03,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 942 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:20:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2023-12-15 21:20:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 716. [2023-12-15 21:20:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 531 states have (on average 1.536723163841808) internal successors, (816), 531 states have internal predecessors, (816), 182 states have call successors, (182), 2 states have call predecessors, (182), 2 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1180 transitions. [2023-12-15 21:20:03,366 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1180 transitions. Word has length 592 [2023-12-15 21:20:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:03,367 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1180 transitions. [2023-12-15 21:20:03,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1180 transitions. [2023-12-15 21:20:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-15 21:20:03,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:03,371 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:03,381 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 21:20:03,579 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 21:20:03,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:03,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash -445851855, now seen corresponding path program 1 times [2023-12-15 21:20:03,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:03,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753083756] [2023-12-15 21:20:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:03,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:03,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38090823] [2023-12-15 21:20:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:03,649 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 21:20:03,675 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 21:20:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:04,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:20:04,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:04,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753083756] [2023-12-15 21:20:04,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38090823] [2023-12-15 21:20:04,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38090823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:04,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:04,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:20:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566507775] [2023-12-15 21:20:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:04,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:20:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:20:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:20:04,068 INFO L87 Difference]: Start difference. First operand 716 states and 1180 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:04,131 INFO L93 Difference]: Finished difference Result 2116 states and 3488 transitions. [2023-12-15 21:20:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:20:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 592 [2023-12-15 21:20:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:04,137 INFO L225 Difference]: With dead ends: 2116 [2023-12-15 21:20:04,137 INFO L226 Difference]: Without dead ends: 1401 [2023-12-15 21:20:04,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 590 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 21:20:04,139 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 436 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:04,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 1262 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:20:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2023-12-15 21:20:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 849. [2023-12-15 21:20:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 664 states have (on average 1.5647590361445782) internal successors, (1039), 664 states have internal predecessors, (1039), 182 states have call successors, (182), 2 states have call predecessors, (182), 2 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1403 transitions. [2023-12-15 21:20:04,201 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1403 transitions. Word has length 592 [2023-12-15 21:20:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:04,202 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1403 transitions. [2023-12-15 21:20:04,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1403 transitions. [2023-12-15 21:20:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-15 21:20:04,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:04,206 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:04,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:04,416 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 21:20:04,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:04,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash -698361421, now seen corresponding path program 1 times [2023-12-15 21:20:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:04,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99638756] [2023-12-15 21:20:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:04,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:04,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838649836] [2023-12-15 21:20:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:04,467 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 21:20:04,469 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 21:20:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:04,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:20:04,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 7860 proven. 165 refuted. 0 times theorem prover too weak. 8355 trivial. 0 not checked. [2023-12-15 21:20:05,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 105 proven. 165 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:05,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99638756] [2023-12-15 21:20:05,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838649836] [2023-12-15 21:20:05,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838649836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:05,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:05,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 21:20:05,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191213502] [2023-12-15 21:20:05,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:05,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:20:05,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:20:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:20:05,461 INFO L87 Difference]: Start difference. First operand 849 states and 1403 transitions. Second operand has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 3 states have call successors, (146), 2 states have call predecessors, (146), 4 states have return successors, (147), 3 states have call predecessors, (147), 3 states have call successors, (147) [2023-12-15 21:20:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:06,115 INFO L93 Difference]: Finished difference Result 1709 states and 2815 transitions. [2023-12-15 21:20:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:20:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 3 states have call successors, (146), 2 states have call predecessors, (146), 4 states have return successors, (147), 3 states have call predecessors, (147), 3 states have call successors, (147) Word has length 592 [2023-12-15 21:20:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:06,119 INFO L225 Difference]: With dead ends: 1709 [2023-12-15 21:20:06,120 INFO L226 Difference]: Without dead ends: 861 [2023-12-15 21:20:06,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:20:06,122 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 556 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:06,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 900 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:20:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2023-12-15 21:20:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 857. [2023-12-15 21:20:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 670 states have (on average 1.5537313432835822) internal successors, (1041), 670 states have internal predecessors, (1041), 182 states have call successors, (182), 4 states have call predecessors, (182), 4 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1405 transitions. [2023-12-15 21:20:06,169 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1405 transitions. Word has length 592 [2023-12-15 21:20:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:06,170 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1405 transitions. [2023-12-15 21:20:06,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 3 states have call successors, (146), 2 states have call predecessors, (146), 4 states have return successors, (147), 3 states have call predecessors, (147), 3 states have call successors, (147) [2023-12-15 21:20:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1405 transitions. [2023-12-15 21:20:06,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2023-12-15 21:20:06,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:06,174 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:06,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:06,384 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 21:20:06,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:06,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1171595468, now seen corresponding path program 1 times [2023-12-15 21:20:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486804060] [2023-12-15 21:20:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:06,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:06,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522191511] [2023-12-15 21:20:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:06,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:06,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:06,434 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 21:20:06,460 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 21:20:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:06,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:20:06,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 6388 proven. 69 refuted. 0 times theorem prover too weak. 9923 trivial. 0 not checked. [2023-12-15 21:20:07,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 201 proven. 69 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:07,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:07,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486804060] [2023-12-15 21:20:07,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522191511] [2023-12-15 21:20:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522191511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:07,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 21:20:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009704342] [2023-12-15 21:20:07,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:20:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:20:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:20:07,300 INFO L87 Difference]: Start difference. First operand 857 states and 1405 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-12-15 21:20:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:08,235 INFO L93 Difference]: Finished difference Result 1727 states and 2819 transitions. [2023-12-15 21:20:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:20:08,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 593 [2023-12-15 21:20:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:08,240 INFO L225 Difference]: With dead ends: 1727 [2023-12-15 21:20:08,240 INFO L226 Difference]: Without dead ends: 871 [2023-12-15 21:20:08,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 1177 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 21:20:08,242 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 984 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:08,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 924 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 21:20:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-12-15 21:20:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 863. [2023-12-15 21:20:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 674 states have (on average 1.5356083086053411) internal successors, (1035), 674 states have internal predecessors, (1035), 182 states have call successors, (182), 6 states have call predecessors, (182), 6 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1399 transitions. [2023-12-15 21:20:08,331 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1399 transitions. Word has length 593 [2023-12-15 21:20:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:08,332 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1399 transitions. [2023-12-15 21:20:08,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-12-15 21:20:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1399 transitions. [2023-12-15 21:20:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:08,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:08,338 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:08,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-15 21:20:08,545 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 21:20:08,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:08,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash -966848401, now seen corresponding path program 1 times [2023-12-15 21:20:08,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:08,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048350420] [2023-12-15 21:20:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:08,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:08,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914939333] [2023-12-15 21:20:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:08,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:08,602 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 21:20:08,626 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 21:20:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:08,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:20:08,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:09,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:09,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048350420] [2023-12-15 21:20:09,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:09,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914939333] [2023-12-15 21:20:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914939333] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:09,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:09,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:20:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109465912] [2023-12-15 21:20:09,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:20:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:20:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:20:09,029 INFO L87 Difference]: Start difference. First operand 863 states and 1399 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:09,466 INFO L93 Difference]: Finished difference Result 2055 states and 3306 transitions. [2023-12-15 21:20:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:20:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 594 [2023-12-15 21:20:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:09,475 INFO L225 Difference]: With dead ends: 2055 [2023-12-15 21:20:09,475 INFO L226 Difference]: Without dead ends: 1185 [2023-12-15 21:20:09,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:20:09,478 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 658 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:09,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1730 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:20:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2023-12-15 21:20:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 865. [2023-12-15 21:20:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 674 states have (on average 1.529673590504451) internal successors, (1031), 674 states have internal predecessors, (1031), 182 states have call successors, (182), 8 states have call predecessors, (182), 8 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1395 transitions. [2023-12-15 21:20:09,566 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1395 transitions. Word has length 594 [2023-12-15 21:20:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:09,566 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1395 transitions. [2023-12-15 21:20:09,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1395 transitions. [2023-12-15 21:20:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:09,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:09,570 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:09,581 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 21:20:09,776 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 21:20:09,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:09,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1084135597, now seen corresponding path program 1 times [2023-12-15 21:20:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:09,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131047043] [2023-12-15 21:20:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:09,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:09,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337959905] [2023-12-15 21:20:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:09,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:09,835 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 21:20:09,840 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 21:20:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:10,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:20:10,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:10,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:10,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:10,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131047043] [2023-12-15 21:20:10,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:10,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337959905] [2023-12-15 21:20:10,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337959905] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:10,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:10,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:20:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015494267] [2023-12-15 21:20:10,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:10,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:20:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:20:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:20:10,239 INFO L87 Difference]: Start difference. First operand 865 states and 1395 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:10,319 INFO L93 Difference]: Finished difference Result 1726 states and 2785 transitions. [2023-12-15 21:20:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:20:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 594 [2023-12-15 21:20:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:10,324 INFO L225 Difference]: With dead ends: 1726 [2023-12-15 21:20:10,324 INFO L226 Difference]: Without dead ends: 862 [2023-12-15 21:20:10,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 592 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 21:20:10,326 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 470 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:10,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1282 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:20:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-12-15 21:20:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 855. [2023-12-15 21:20:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 664 states have (on average 1.516566265060241) internal successors, (1007), 664 states have internal predecessors, (1007), 182 states have call successors, (182), 8 states have call predecessors, (182), 8 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1371 transitions. [2023-12-15 21:20:10,371 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1371 transitions. Word has length 594 [2023-12-15 21:20:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:10,372 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1371 transitions. [2023-12-15 21:20:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1371 transitions. [2023-12-15 21:20:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:10,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:10,376 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:10,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-15 21:20:10,583 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 21:20:10,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:10,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash 502275949, now seen corresponding path program 1 times [2023-12-15 21:20:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:10,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294423606] [2023-12-15 21:20:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:10,643 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43227759] [2023-12-15 21:20:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:10,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:10,650 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 21:20:10,655 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 21:20:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:11,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:20:11,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 6388 proven. 69 refuted. 0 times theorem prover too weak. 9923 trivial. 0 not checked. [2023-12-15 21:20:11,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 201 proven. 69 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:11,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:11,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294423606] [2023-12-15 21:20:11,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:11,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43227759] [2023-12-15 21:20:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43227759] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:11,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:11,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 21:20:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435538362] [2023-12-15 21:20:11,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:11,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:20:11,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:20:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:20:11,500 INFO L87 Difference]: Start difference. First operand 855 states and 1371 transitions. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-12-15 21:20:12,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:12,073 INFO L93 Difference]: Finished difference Result 1608 states and 2565 transitions. [2023-12-15 21:20:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:20:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 594 [2023-12-15 21:20:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:12,077 INFO L225 Difference]: With dead ends: 1608 [2023-12-15 21:20:12,077 INFO L226 Difference]: Without dead ends: 754 [2023-12-15 21:20:12,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1194 GetRequests, 1179 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 21:20:12,079 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 795 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:12,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 906 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:20:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-12-15 21:20:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 742. [2023-12-15 21:20:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 551 states have (on average 1.471869328493648) internal successors, (811), 551 states have internal predecessors, (811), 182 states have call successors, (182), 8 states have call predecessors, (182), 8 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-12-15 21:20:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1175 transitions. [2023-12-15 21:20:12,124 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1175 transitions. Word has length 594 [2023-12-15 21:20:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:12,124 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 1175 transitions. [2023-12-15 21:20:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-12-15 21:20:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1175 transitions. [2023-12-15 21:20:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:12,128 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:12,128 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:12,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:12,339 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 21:20:12,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:12,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1630804521, now seen corresponding path program 1 times [2023-12-15 21:20:12,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:12,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705410534] [2023-12-15 21:20:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:12,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388703550] [2023-12-15 21:20:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:12,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:12,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:12,429 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 21:20:12,433 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 21:20:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:12,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 21:20:12,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:13,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:13,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:13,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705410534] [2023-12-15 21:20:13,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:13,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388703550] [2023-12-15 21:20:13,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388703550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:13,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:13,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:20:13,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332842734] [2023-12-15 21:20:13,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:13,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:20:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:20:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:20:13,349 INFO L87 Difference]: Start difference. First operand 742 states and 1175 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:14,400 INFO L93 Difference]: Finished difference Result 2842 states and 4511 transitions. [2023-12-15 21:20:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:20:14,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 594 [2023-12-15 21:20:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:14,408 INFO L225 Difference]: With dead ends: 2842 [2023-12-15 21:20:14,409 INFO L226 Difference]: Without dead ends: 2069 [2023-12-15 21:20:14,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:20:14,411 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 1119 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:14,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 1980 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 21:20:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2023-12-15 21:20:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1409. [2023-12-15 21:20:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1028 states have (on average 1.4698443579766538) internal successors, (1511), 1028 states have internal predecessors, (1511), 364 states have call successors, (364), 16 states have call predecessors, (364), 16 states have return successors, (364), 364 states have call predecessors, (364), 364 states have call successors, (364) [2023-12-15 21:20:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2239 transitions. [2023-12-15 21:20:14,514 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2239 transitions. Word has length 594 [2023-12-15 21:20:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:14,514 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 2239 transitions. [2023-12-15 21:20:14,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2239 transitions. [2023-12-15 21:20:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:14,518 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:14,518 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:14,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:14,726 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 21:20:14,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:14,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1783066587, now seen corresponding path program 1 times [2023-12-15 21:20:14,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:14,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940628572] [2023-12-15 21:20:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:14,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:14,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340289008] [2023-12-15 21:20:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:14,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:14,781 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 21:20:14,806 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 21:20:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:15,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:20:15,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:15,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:15,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940628572] [2023-12-15 21:20:15,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340289008] [2023-12-15 21:20:15,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340289008] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:15,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:15,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:20:15,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345792725] [2023-12-15 21:20:15,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:15,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:20:15,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:20:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:20:15,185 INFO L87 Difference]: Start difference. First operand 1409 states and 2239 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:15,351 INFO L93 Difference]: Finished difference Result 3761 states and 5981 transitions. [2023-12-15 21:20:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:20:15,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 594 [2023-12-15 21:20:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:15,360 INFO L225 Difference]: With dead ends: 3761 [2023-12-15 21:20:15,360 INFO L226 Difference]: Without dead ends: 2583 [2023-12-15 21:20:15,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 592 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 21:20:15,363 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 464 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:15,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1229 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:20:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2023-12-15 21:20:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2569. [2023-12-15 21:20:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 1903 states have (on average 1.4592748292170257) internal successors, (2777), 1903 states have internal predecessors, (2777), 637 states have call successors, (637), 28 states have call predecessors, (637), 28 states have return successors, (637), 637 states have call predecessors, (637), 637 states have call successors, (637) [2023-12-15 21:20:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 4051 transitions. [2023-12-15 21:20:15,494 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 4051 transitions. Word has length 594 [2023-12-15 21:20:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:15,495 INFO L495 AbstractCegarLoop]: Abstraction has 2569 states and 4051 transitions. [2023-12-15 21:20:15,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 4051 transitions. [2023-12-15 21:20:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:15,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:15,501 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:15,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:15,708 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 21:20:15,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:15,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash 562934119, now seen corresponding path program 1 times [2023-12-15 21:20:15,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002467203] [2023-12-15 21:20:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:15,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66374575] [2023-12-15 21:20:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:15,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:15,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:15,753 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 21:20:15,763 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 21:20:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:16,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 21:20:16,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 6210 proven. 66 refuted. 0 times theorem prover too weak. 10104 trivial. 0 not checked. [2023-12-15 21:20:16,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 204 proven. 66 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:16,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002467203] [2023-12-15 21:20:16,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66374575] [2023-12-15 21:20:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66374575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:16,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:16,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-15 21:20:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980030963] [2023-12-15 21:20:16,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:16,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 21:20:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 21:20:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:20:16,764 INFO L87 Difference]: Start difference. First operand 2569 states and 4051 transitions. Second operand has 9 states, 9 states have (on average 23.88888888888889) internal successors, (215), 9 states have internal predecessors, (215), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-12-15 21:20:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:17,707 INFO L93 Difference]: Finished difference Result 4871 states and 7622 transitions. [2023-12-15 21:20:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-15 21:20:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.88888888888889) internal successors, (215), 9 states have internal predecessors, (215), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) Word has length 594 [2023-12-15 21:20:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:17,718 INFO L225 Difference]: With dead ends: 4871 [2023-12-15 21:20:17,718 INFO L226 Difference]: Without dead ends: 2641 [2023-12-15 21:20:17,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1179 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2023-12-15 21:20:17,724 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1037 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:17,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 1575 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 21:20:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2023-12-15 21:20:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2593. [2023-12-15 21:20:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 1920 states have (on average 1.4510416666666666) internal successors, (2786), 1920 states have internal predecessors, (2786), 637 states have call successors, (637), 35 states have call predecessors, (637), 35 states have return successors, (637), 637 states have call predecessors, (637), 637 states have call successors, (637) [2023-12-15 21:20:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 4060 transitions. [2023-12-15 21:20:17,901 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 4060 transitions. Word has length 594 [2023-12-15 21:20:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:17,902 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 4060 transitions. [2023-12-15 21:20:17,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.88888888888889) internal successors, (215), 9 states have internal predecessors, (215), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-12-15 21:20:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 4060 transitions. [2023-12-15 21:20:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:17,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:17,906 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:17,915 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 21:20:18,113 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 21:20:18,114 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:18,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 937154499, now seen corresponding path program 1 times [2023-12-15 21:20:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:18,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813198844] [2023-12-15 21:20:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:18,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:18,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714699] [2023-12-15 21:20:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:18,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:18,173 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 21:20:18,197 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 21:20:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:18,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:20:18,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:19,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813198844] [2023-12-15 21:20:19,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714699] [2023-12-15 21:20:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714699] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:19,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:19,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:20:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506262055] [2023-12-15 21:20:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:19,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:20:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:20:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:20:19,215 INFO L87 Difference]: Start difference. First operand 2593 states and 4060 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:20,903 INFO L93 Difference]: Finished difference Result 13608 states and 21249 transitions. [2023-12-15 21:20:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:20:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 594 [2023-12-15 21:20:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:20,950 INFO L225 Difference]: With dead ends: 13608 [2023-12-15 21:20:20,950 INFO L226 Difference]: Without dead ends: 10359 [2023-12-15 21:20:20,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:20:20,959 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 1655 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:20,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1655 Valid, 2799 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 21:20:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2023-12-15 21:20:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 7055. [2023-12-15 21:20:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7055 states, 5781 states have (on average 1.4732745199792423) internal successors, (8517), 5787 states have internal predecessors, (8517), 1201 states have call successors, (1201), 72 states have call predecessors, (1201), 72 states have return successors, (1201), 1195 states have call predecessors, (1201), 1201 states have call successors, (1201) [2023-12-15 21:20:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7055 states to 7055 states and 10919 transitions. [2023-12-15 21:20:21,363 INFO L78 Accepts]: Start accepts. Automaton has 7055 states and 10919 transitions. Word has length 594 [2023-12-15 21:20:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:21,363 INFO L495 AbstractCegarLoop]: Abstraction has 7055 states and 10919 transitions. [2023-12-15 21:20:21,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7055 states and 10919 transitions. [2023-12-15 21:20:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:21,369 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:21,369 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:21,377 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 21:20:21,577 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 21:20:21,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:21,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:21,578 INFO L85 PathProgramCache]: Analyzing trace with hash -418514051, now seen corresponding path program 1 times [2023-12-15 21:20:21,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457059237] [2023-12-15 21:20:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:21,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:21,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301897425] [2023-12-15 21:20:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:21,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:21,634 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 21:20:21,640 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 21:20:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:22,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 21:20:22,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:22,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:22,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457059237] [2023-12-15 21:20:22,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301897425] [2023-12-15 21:20:22,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301897425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:22,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:22,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:20:22,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875535083] [2023-12-15 21:20:22,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:22,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:20:22,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:20:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:20:22,237 INFO L87 Difference]: Start difference. First operand 7055 states and 10919 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:23,173 INFO L93 Difference]: Finished difference Result 17540 states and 27163 transitions. [2023-12-15 21:20:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:20:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 594 [2023-12-15 21:20:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:23,204 INFO L225 Difference]: With dead ends: 17540 [2023-12-15 21:20:23,204 INFO L226 Difference]: Without dead ends: 11016 [2023-12-15 21:20:23,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:20:23,218 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 751 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:23,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1783 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:20:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11016 states. [2023-12-15 21:20:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11016 to 7433. [2023-12-15 21:20:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 6135 states have (on average 1.4616136919315403) internal successors, (8967), 6147 states have internal predecessors, (8967), 1219 states have call successors, (1219), 78 states have call predecessors, (1219), 78 states have return successors, (1219), 1207 states have call predecessors, (1219), 1219 states have call successors, (1219) [2023-12-15 21:20:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 11405 transitions. [2023-12-15 21:20:23,656 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 11405 transitions. Word has length 594 [2023-12-15 21:20:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:23,657 INFO L495 AbstractCegarLoop]: Abstraction has 7433 states and 11405 transitions. [2023-12-15 21:20:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 11405 transitions. [2023-12-15 21:20:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-15 21:20:23,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:23,663 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:23,672 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 21:20:23,870 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 21:20:23,870 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:23,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:23,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2107457793, now seen corresponding path program 1 times [2023-12-15 21:20:23,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:23,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131785969] [2023-12-15 21:20:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:23,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:23,916 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:23,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635562559] [2023-12-15 21:20:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:23,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:23,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:23,926 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 21:20:23,927 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 21:20:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:24,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:20:24,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 1140 proven. 261 refuted. 0 times theorem prover too weak. 14979 trivial. 0 not checked. [2023-12-15 21:20:24,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 9 proven. 261 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131785969] [2023-12-15 21:20:25,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635562559] [2023-12-15 21:20:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635562559] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:25,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:25,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:20:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793176630] [2023-12-15 21:20:25,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:25,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:20:25,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:20:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:20:25,232 INFO L87 Difference]: Start difference. First operand 7433 states and 11405 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 2 states have call predecessors, (179), 2 states have call successors, (179) [2023-12-15 21:20:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:25,844 INFO L93 Difference]: Finished difference Result 12904 states and 19743 transitions. [2023-12-15 21:20:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:20:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 2 states have call predecessors, (179), 2 states have call successors, (179) Word has length 594 [2023-12-15 21:20:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:25,857 INFO L225 Difference]: With dead ends: 12904 [2023-12-15 21:20:25,857 INFO L226 Difference]: Without dead ends: 5960 [2023-12-15 21:20:25,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1180 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 21:20:25,870 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 224 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:25,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 892 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:20:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2023-12-15 21:20:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5882. [2023-12-15 21:20:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5882 states, 4595 states have (on average 1.4139281828073993) internal successors, (6497), 4601 states have internal predecessors, (6497), 1201 states have call successors, (1201), 85 states have call predecessors, (1201), 85 states have return successors, (1201), 1195 states have call predecessors, (1201), 1201 states have call successors, (1201) [2023-12-15 21:20:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 8899 transitions. [2023-12-15 21:20:26,232 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 8899 transitions. Word has length 594 [2023-12-15 21:20:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:26,232 INFO L495 AbstractCegarLoop]: Abstraction has 5882 states and 8899 transitions. [2023-12-15 21:20:26,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 2 states have call predecessors, (179), 2 states have call successors, (179) [2023-12-15 21:20:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 8899 transitions. [2023-12-15 21:20:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:26,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:26,238 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:26,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-15 21:20:26,445 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 21:20:26,446 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:26,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:26,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1428250458, now seen corresponding path program 1 times [2023-12-15 21:20:26,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:26,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617985370] [2023-12-15 21:20:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:26,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:26,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119901660] [2023-12-15 21:20:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:26,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:26,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:26,493 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 21:20:26,525 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 21:20:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:26,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:20:26,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 4374 proven. 228 refuted. 0 times theorem prover too weak. 11778 trivial. 0 not checked. [2023-12-15 21:20:27,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 42 proven. 228 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:27,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617985370] [2023-12-15 21:20:27,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119901660] [2023-12-15 21:20:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119901660] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:27,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:27,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 21:20:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911655719] [2023-12-15 21:20:27,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:27,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:20:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:27,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:20:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:20:27,752 INFO L87 Difference]: Start difference. First operand 5882 states and 8899 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 2 states have call predecessors, (168), 2 states have call successors, (168) [2023-12-15 21:20:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:28,835 INFO L93 Difference]: Finished difference Result 8350 states and 12562 transitions. [2023-12-15 21:20:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 21:20:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 2 states have call predecessors, (168), 2 states have call successors, (168) Word has length 595 [2023-12-15 21:20:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:28,846 INFO L225 Difference]: With dead ends: 8350 [2023-12-15 21:20:28,846 INFO L226 Difference]: Without dead ends: 6040 [2023-12-15 21:20:28,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1181 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-15 21:20:28,850 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 606 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:28,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1867 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 21:20:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2023-12-15 21:20:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 5934. [2023-12-15 21:20:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5934 states, 4634 states have (on average 1.4056970220112215) internal successors, (6514), 4640 states have internal predecessors, (6514), 1201 states have call successors, (1201), 98 states have call predecessors, (1201), 98 states have return successors, (1201), 1195 states have call predecessors, (1201), 1201 states have call successors, (1201) [2023-12-15 21:20:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5934 states to 5934 states and 8916 transitions. [2023-12-15 21:20:29,187 INFO L78 Accepts]: Start accepts. Automaton has 5934 states and 8916 transitions. Word has length 595 [2023-12-15 21:20:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:29,188 INFO L495 AbstractCegarLoop]: Abstraction has 5934 states and 8916 transitions. [2023-12-15 21:20:29,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 2 states have call predecessors, (168), 2 states have call successors, (168) [2023-12-15 21:20:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 5934 states and 8916 transitions. [2023-12-15 21:20:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:29,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:29,193 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:29,204 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 21:20:29,404 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 21:20:29,404 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:29,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2044209708, now seen corresponding path program 1 times [2023-12-15 21:20:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:29,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490889406] [2023-12-15 21:20:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:29,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:29,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973053619] [2023-12-15 21:20:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:29,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:29,455 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 21:20:29,484 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 21:20:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:29,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 21:20:29,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:29,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490889406] [2023-12-15 21:20:29,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973053619] [2023-12-15 21:20:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973053619] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:20:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883418232] [2023-12-15 21:20:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:29,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:20:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:20:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:20:29,945 INFO L87 Difference]: Start difference. First operand 5934 states and 8916 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:30,308 INFO L93 Difference]: Finished difference Result 8736 states and 13126 transitions. [2023-12-15 21:20:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:20:30,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 595 [2023-12-15 21:20:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:30,324 INFO L225 Difference]: With dead ends: 8736 [2023-12-15 21:20:30,324 INFO L226 Difference]: Without dead ends: 6450 [2023-12-15 21:20:30,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 593 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 21:20:30,331 INFO L413 NwaCegarLoop]: 1325 mSDtfsCounter, 923 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:30,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 2312 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:20:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6450 states. [2023-12-15 21:20:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6450 to 5930. [2023-12-15 21:20:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5930 states, 4630 states have (on average 1.4043196544276457) internal successors, (6502), 4636 states have internal predecessors, (6502), 1201 states have call successors, (1201), 98 states have call predecessors, (1201), 98 states have return successors, (1201), 1195 states have call predecessors, (1201), 1201 states have call successors, (1201) [2023-12-15 21:20:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5930 states to 5930 states and 8904 transitions. [2023-12-15 21:20:30,733 INFO L78 Accepts]: Start accepts. Automaton has 5930 states and 8904 transitions. Word has length 595 [2023-12-15 21:20:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:30,734 INFO L495 AbstractCegarLoop]: Abstraction has 5930 states and 8904 transitions. [2023-12-15 21:20:30,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5930 states and 8904 transitions. [2023-12-15 21:20:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:30,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:30,740 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:30,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:30,948 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 21:20:30,949 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:30,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1200204206, now seen corresponding path program 1 times [2023-12-15 21:20:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:30,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789943200] [2023-12-15 21:20:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:30,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:30,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:31,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795624896] [2023-12-15 21:20:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:31,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:31,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:31,001 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 21:20:31,005 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 21:20:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:31,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 21:20:31,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-12-15 21:20:32,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:20:32,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:32,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789943200] [2023-12-15 21:20:32,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:32,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795624896] [2023-12-15 21:20:32,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795624896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:20:32,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:20:32,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 21:20:32,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893425574] [2023-12-15 21:20:32,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:20:32,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:20:32,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:32,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:20:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:20:32,026 INFO L87 Difference]: Start difference. First operand 5930 states and 8904 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:32,999 INFO L93 Difference]: Finished difference Result 12042 states and 18041 transitions. [2023-12-15 21:20:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:20:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 595 [2023-12-15 21:20:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:33,013 INFO L225 Difference]: With dead ends: 12042 [2023-12-15 21:20:33,014 INFO L226 Difference]: Without dead ends: 6637 [2023-12-15 21:20:33,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-12-15 21:20:33,023 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 689 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:33,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 2159 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:20:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2023-12-15 21:20:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 5926. [2023-12-15 21:20:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 4626 states have (on average 1.4012105490704712) internal successors, (6482), 4632 states have internal predecessors, (6482), 1201 states have call successors, (1201), 98 states have call predecessors, (1201), 98 states have return successors, (1201), 1195 states have call predecessors, (1201), 1201 states have call successors, (1201) [2023-12-15 21:20:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 8884 transitions. [2023-12-15 21:20:33,405 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 8884 transitions. Word has length 595 [2023-12-15 21:20:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:33,405 INFO L495 AbstractCegarLoop]: Abstraction has 5926 states and 8884 transitions. [2023-12-15 21:20:33,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-12-15 21:20:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 8884 transitions. [2023-12-15 21:20:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:33,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:33,410 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:33,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-15 21:20:33,634 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 21:20:33,635 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:33,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 366629094, now seen corresponding path program 1 times [2023-12-15 21:20:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017955661] [2023-12-15 21:20:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:33,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:33,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:33,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563552427] [2023-12-15 21:20:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:33,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:33,680 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 21:20:33,710 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 21:20:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:34,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-15 21:20:34,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 11375 proven. 510 refuted. 0 times theorem prover too weak. 4495 trivial. 0 not checked. [2023-12-15 21:20:35,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:36,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:36,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017955661] [2023-12-15 21:20:36,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:36,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563552427] [2023-12-15 21:20:36,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563552427] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:20:36,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 21:20:36,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-15 21:20:36,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170956383] [2023-12-15 21:20:36,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:36,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 21:20:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 21:20:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-12-15 21:20:36,954 INFO L87 Difference]: Start difference. First operand 5926 states and 8884 transitions. Second operand has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 16 states have internal predecessors, (164), 5 states have call successors, (91), 5 states have call predecessors, (91), 8 states have return successors, (91), 5 states have call predecessors, (91), 5 states have call successors, (91) [2023-12-15 21:20:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:39,498 INFO L93 Difference]: Finished difference Result 15537 states and 22948 transitions. [2023-12-15 21:20:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 21:20:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 16 states have internal predecessors, (164), 5 states have call successors, (91), 5 states have call predecessors, (91), 8 states have return successors, (91), 5 states have call predecessors, (91), 5 states have call successors, (91) Word has length 595 [2023-12-15 21:20:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:39,517 INFO L225 Difference]: With dead ends: 15537 [2023-12-15 21:20:39,517 INFO L226 Difference]: Without dead ends: 9792 [2023-12-15 21:20:39,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2023-12-15 21:20:39,527 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1902 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 1776 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-15 21:20:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2023-12-15 21:20:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 6252. [2023-12-15 21:20:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6252 states, 4888 states have (on average 1.3770458265139116) internal successors, (6731), 4894 states have internal predecessors, (6731), 1201 states have call successors, (1201), 162 states have call predecessors, (1201), 162 states have return successors, (1201), 1195 states have call predecessors, (1201), 1201 states have call successors, (1201) [2023-12-15 21:20:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 9133 transitions. [2023-12-15 21:20:40,016 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 9133 transitions. Word has length 595 [2023-12-15 21:20:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 6252 states and 9133 transitions. [2023-12-15 21:20:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 16 states have internal predecessors, (164), 5 states have call successors, (91), 5 states have call predecessors, (91), 8 states have return successors, (91), 5 states have call predecessors, (91), 5 states have call successors, (91) [2023-12-15 21:20:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 9133 transitions. [2023-12-15 21:20:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:40,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:40,021 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:40,040 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 21:20:40,230 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 21:20:40,230 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:40,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1719660646, now seen corresponding path program 1 times [2023-12-15 21:20:40,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:40,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363656175] [2023-12-15 21:20:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:40,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:40,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:40,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250810842] [2023-12-15 21:20:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:40,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:40,284 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 21:20:40,287 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 21:20:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:40,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 21:20:40,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 6640 proven. 195 refuted. 0 times theorem prover too weak. 9545 trivial. 0 not checked. [2023-12-15 21:20:41,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 75 proven. 195 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363656175] [2023-12-15 21:20:41,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250810842] [2023-12-15 21:20:41,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250810842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:41,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:41,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-15 21:20:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645329690] [2023-12-15 21:20:41,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 21:20:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 21:20:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-15 21:20:41,451 INFO L87 Difference]: Start difference. First operand 6252 states and 9133 transitions. Second operand has 10 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 3 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 3 states have call predecessors, (157), 3 states have call successors, (157) [2023-12-15 21:20:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:43,031 INFO L93 Difference]: Finished difference Result 15604 states and 22611 transitions. [2023-12-15 21:20:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 21:20:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 3 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 3 states have call predecessors, (157), 3 states have call successors, (157) Word has length 595 [2023-12-15 21:20:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:43,048 INFO L225 Difference]: With dead ends: 15604 [2023-12-15 21:20:43,048 INFO L226 Difference]: Without dead ends: 9774 [2023-12-15 21:20:43,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1180 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-12-15 21:20:43,058 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1368 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:43,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 1440 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 21:20:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2023-12-15 21:20:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 9556. [2023-12-15 21:20:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9556 states, 7793 states have (on average 1.3863723854741434) internal successors, (10804), 7817 states have internal predecessors, (10804), 1519 states have call successors, (1519), 243 states have call predecessors, (1519), 243 states have return successors, (1519), 1495 states have call predecessors, (1519), 1519 states have call successors, (1519) [2023-12-15 21:20:43,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9556 states to 9556 states and 13842 transitions. [2023-12-15 21:20:43,689 INFO L78 Accepts]: Start accepts. Automaton has 9556 states and 13842 transitions. Word has length 595 [2023-12-15 21:20:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:43,689 INFO L495 AbstractCegarLoop]: Abstraction has 9556 states and 13842 transitions. [2023-12-15 21:20:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 3 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 3 states have call predecessors, (157), 3 states have call successors, (157) [2023-12-15 21:20:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9556 states and 13842 transitions. [2023-12-15 21:20:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:43,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:43,695 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:43,703 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 21:20:43,903 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 21:20:43,903 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:43,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1760335396, now seen corresponding path program 1 times [2023-12-15 21:20:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045822077] [2023-12-15 21:20:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:43,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:43,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435049823] [2023-12-15 21:20:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:43,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:43,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:43,946 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 21:20:43,948 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 21:20:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:20:44,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 21:20:44,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:20:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 8280 proven. 135 refuted. 0 times theorem prover too weak. 7965 trivial. 0 not checked. [2023-12-15 21:20:45,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:20:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 135 proven. 135 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-12-15 21:20:45,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:20:45,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045822077] [2023-12-15 21:20:45,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:20:45,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435049823] [2023-12-15 21:20:45,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435049823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:20:45,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:20:45,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-15 21:20:45,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455316646] [2023-12-15 21:20:45,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:20:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 21:20:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:20:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 21:20:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:20:45,830 INFO L87 Difference]: Start difference. First operand 9556 states and 13842 transitions. Second operand has 12 states, 12 states have (on average 23.416666666666668) internal successors, (281), 12 states have internal predecessors, (281), 4 states have call successors, (182), 3 states have call predecessors, (182), 5 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) [2023-12-15 21:20:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:20:48,593 INFO L93 Difference]: Finished difference Result 34442 states and 50352 transitions. [2023-12-15 21:20:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 21:20:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 23.416666666666668) internal successors, (281), 12 states have internal predecessors, (281), 4 states have call successors, (182), 3 states have call predecessors, (182), 5 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) Word has length 595 [2023-12-15 21:20:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:20:48,641 INFO L225 Difference]: With dead ends: 34442 [2023-12-15 21:20:48,641 INFO L226 Difference]: Without dead ends: 25254 [2023-12-15 21:20:48,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1194 GetRequests, 1178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-15 21:20:48,654 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 904 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:20:48,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 2494 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 21:20:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25254 states. [2023-12-15 21:20:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25254 to 18634. [2023-12-15 21:20:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 15202 states have (on average 1.3827128009472438) internal successors, (21020), 15250 states have internal predecessors, (21020), 2947 states have call successors, (2947), 484 states have call predecessors, (2947), 484 states have return successors, (2947), 2899 states have call predecessors, (2947), 2947 states have call successors, (2947) [2023-12-15 21:20:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 26914 transitions. [2023-12-15 21:20:50,191 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 26914 transitions. Word has length 595 [2023-12-15 21:20:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:20:50,191 INFO L495 AbstractCegarLoop]: Abstraction has 18634 states and 26914 transitions. [2023-12-15 21:20:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.416666666666668) internal successors, (281), 12 states have internal predecessors, (281), 4 states have call successors, (182), 3 states have call predecessors, (182), 5 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) [2023-12-15 21:20:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 26914 transitions. [2023-12-15 21:20:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-12-15 21:20:50,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:20:50,198 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:50,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:50,407 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 21:20:50,407 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:20:50,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:20:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1316434722, now seen corresponding path program 1 times [2023-12-15 21:20:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:20:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568194475] [2023-12-15 21:20:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:20:50,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:20:50,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495376741] [2023-12-15 21:20:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:20:50,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:20:50,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:20:50,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 21:20:56,775 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 21:20:56,816 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:20:57,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-15 21:20:58,016 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forcibly destroying the process [2023-12-15 21:20:58,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-15 21:20:58,022 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:20:58,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:20:58,022 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 596 with TraceHistMax 91,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-15 21:20:58,025 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:20:58,026 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:20:58,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:20:58 BoogieIcfgContainer [2023-12-15 21:20:58,028 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:20:58,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 137 [2023-12-15 21:20:58,031 INFO L158 Benchmark]: Toolchain (without parser) took 59553.62ms. Allocated memory was 206.6MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 149.8MB in the beginning and 646.4MB in the end (delta: -496.5MB). Peak memory consumption was 726.1MB. Max. memory is 8.0GB. [2023-12-15 21:20:58,031 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 206.6MB. Free memory is still 154.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:20:58,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 474.63ms. Allocated memory is still 206.6MB. Free memory was 149.6MB in the beginning and 156.0MB in the end (delta: -6.5MB). Peak memory consumption was 28.4MB. Max. memory is 8.0GB. [2023-12-15 21:20:58,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 114.21ms. Allocated memory is still 206.6MB. Free memory was 156.0MB in the beginning and 130.9MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2023-12-15 21:20:58,033 INFO L158 Benchmark]: Boogie Preprocessor took 174.11ms. Allocated memory is still 206.6MB. Free memory was 130.9MB in the beginning and 80.5MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. [2023-12-15 21:20:58,033 INFO L158 Benchmark]: RCFGBuilder took 1077.01ms. Allocated memory was 206.6MB in the beginning and 267.4MB in the end (delta: 60.8MB). Free memory was 80.0MB in the beginning and 194.8MB in the end (delta: -114.8MB). Peak memory consumption was 51.9MB. Max. memory is 8.0GB. [2023-12-15 21:20:58,033 INFO L158 Benchmark]: TraceAbstraction took 57708.72ms. Allocated memory was 267.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 193.8MB in the beginning and 646.4MB in the end (delta: -452.6MB). Peak memory consumption was 707.7MB. Max. memory is 8.0GB. [2023-12-15 21:20:58,034 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 206.6MB. Free memory is still 154.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 474.63ms. Allocated memory is still 206.6MB. Free memory was 149.6MB in the beginning and 156.0MB in the end (delta: -6.5MB). Peak memory consumption was 28.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 114.21ms. Allocated memory is still 206.6MB. Free memory was 156.0MB in the beginning and 130.9MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 174.11ms. Allocated memory is still 206.6MB. Free memory was 130.9MB in the beginning and 80.5MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. * RCFGBuilder took 1077.01ms. Allocated memory was 206.6MB in the beginning and 267.4MB in the end (delta: 60.8MB). Free memory was 80.0MB in the beginning and 194.8MB in the end (delta: -114.8MB). Peak memory consumption was 51.9MB. Max. memory is 8.0GB. * TraceAbstraction took 57708.72ms. Allocated memory was 267.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 193.8MB in the beginning and 646.4MB in the end (delta: -452.6MB). Peak memory consumption was 707.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 596 with TraceHistMax 91,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 298 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.7s, OverallIterations: 22, TraceHistogramMax: 91, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 18.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16785 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16432 mSDsluCounter, 31659 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19466 mSDsCounter, 3705 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11529 IncrementalHoareTripleChecker+Invalid, 15234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3705 mSolverCounterUnsat, 12193 mSDtfsCounter, 11529 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17373 GetRequests, 17178 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18634occurred in iteration=21, InterpolantAutomatonStates: 180, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.9s AutomataMinimizationTime, 21 MinimizatonAttempts, 20522 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 13061 NumberOfCodeBlocks, 13061 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 17192 ConstructedInterpolants, 1 QuantifiedInterpolants, 44633 SizeOfPredicates, 69 NumberOfNonLiveVariables, 30203 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 29 InterpolantComputations, 12 PerfectInterpolantSequences, 472134/475020 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