/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-73.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 14:15:10,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 14:15:10,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 14:15:10,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 14:15:10,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 14:15:10,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 14:15:10,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 14:15:10,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 14:15:10,279 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 14:15:10,279 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 14:15:10,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 14:15:10,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 14:15:10,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 14:15:10,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 14:15:10,280 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 14:15:10,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 14:15:10,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 14:15:10,281 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 14:15:10,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 14:15:10,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 14:15:10,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 14:15:10,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 14:15:10,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 14:15:10,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 14:15:10,289 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 14:15:10,289 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 14:15:10,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 14:15:10,290 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 14:15:10,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 14:15:10,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 14:15:10,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 14:15:10,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 14:15:10,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 14:15:10,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 14:15:10,293 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 14:15:10,293 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 14:15:10,293 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 14:15:10,293 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 14:15:10,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 14:15:10,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 14:15:10,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 14:15:10,470 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 14:15:10,470 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 14:15:10,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-73.i [2023-12-19 14:15:11,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 14:15:11,690 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 14:15:11,691 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-73.i [2023-12-19 14:15:11,704 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7055e9c7b/a7273efed3ae41c5a241795368223c80/FLAG539b0445a [2023-12-19 14:15:11,714 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7055e9c7b/a7273efed3ae41c5a241795368223c80 [2023-12-19 14:15:11,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 14:15:11,717 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 14:15:11,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 14:15:11,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 14:15:11,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 14:15:11,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:15:11" (1/1) ... [2023-12-19 14:15:11,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef2f89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:11, skipping insertion in model container [2023-12-19 14:15:11,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:15:11" (1/1) ... [2023-12-19 14:15:11,793 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 14:15:11,885 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-73.i[916,929] [2023-12-19 14:15:12,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 14:15:12,072 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 14:15:12,080 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-73.i[916,929] [2023-12-19 14:15:12,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 14:15:12,222 INFO L206 MainTranslator]: Completed translation [2023-12-19 14:15:12,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12 WrapperNode [2023-12-19 14:15:12,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 14:15:12,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 14:15:12,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 14:15:12,223 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 14:15:12,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,340 INFO L138 Inliner]: procedures = 26, calls = 102, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 780 [2023-12-19 14:15:12,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 14:15:12,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 14:15:12,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 14:15:12,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 14:15:12,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,361 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,399 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 14:15:12,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 14:15:12,482 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 14:15:12,482 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 14:15:12,482 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 14:15:12,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (1/1) ... [2023-12-19 14:15:12,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 14:15:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:12,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 14:15:12,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 14:15:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 14:15:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 14:15:12,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 14:15:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 14:15:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 14:15:12,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 14:15:12,711 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 14:15:12,713 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 14:15:13,533 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 14:15:13,579 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 14:15:13,579 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 14:15:13,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:15:13 BoogieIcfgContainer [2023-12-19 14:15:13,579 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 14:15:13,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 14:15:13,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 14:15:13,584 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 14:15:13,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 02:15:11" (1/3) ... [2023-12-19 14:15:13,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e6a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:15:13, skipping insertion in model container [2023-12-19 14:15:13,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:15:12" (2/3) ... [2023-12-19 14:15:13,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e6a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:15:13, skipping insertion in model container [2023-12-19 14:15:13,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:15:13" (3/3) ... [2023-12-19 14:15:13,587 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-73.i [2023-12-19 14:15:13,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 14:15:13,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 14:15:13,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 14:15:13,663 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;@16121283, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 14:15:13,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 14:15:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 298 states, 206 states have (on average 1.5436893203883495) internal successors, (318), 207 states have internal predecessors, (318), 89 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-19 14:15:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-19 14:15:13,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:13,724 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:13,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:13,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1661617016, now seen corresponding path program 1 times [2023-12-19 14:15:13,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:13,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194354831] [2023-12-19 14:15:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194354831] [2023-12-19 14:15:14,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 14:15:14,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885163341] [2023-12-19 14:15:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:14,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 14:15:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:14,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 14:15:14,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2023-12-19 14:15:14,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885163341] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:14,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:14,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 14:15:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248113179] [2023-12-19 14:15:14,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 14:15:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 14:15:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 14:15:14,561 INFO L87 Difference]: Start difference. First operand has 298 states, 206 states have (on average 1.5436893203883495) internal successors, (318), 207 states have internal predecessors, (318), 89 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (89), 2 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 2 states have call successors, (89) [2023-12-19 14:15:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:14,642 INFO L93 Difference]: Finished difference Result 591 states and 1075 transitions. [2023-12-19 14:15:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 14:15:14,644 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (89), 2 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 2 states have call successors, (89) Word has length 587 [2023-12-19 14:15:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:14,650 INFO L225 Difference]: With dead ends: 591 [2023-12-19 14:15:14,650 INFO L226 Difference]: Without dead ends: 294 [2023-12-19 14:15:14,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 14:15:14,657 INFO L413 NwaCegarLoop]: 483 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, 483 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:14,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 483 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:15:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-12-19 14:15:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2023-12-19 14:15:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 203 states have (on average 1.5172413793103448) internal successors, (308), 203 states have internal predecessors, (308), 89 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-19 14:15:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 486 transitions. [2023-12-19 14:15:14,704 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 486 transitions. Word has length 587 [2023-12-19 14:15:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:14,704 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 486 transitions. [2023-12-19 14:15:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (89), 2 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 2 states have call successors, (89) [2023-12-19 14:15:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 486 transitions. [2023-12-19 14:15:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-19 14:15:14,714 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:14,714 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:14,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:14,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 14:15:14,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:14,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash 14971966, now seen corresponding path program 1 times [2023-12-19 14:15:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204743667] [2023-12-19 14:15:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:15,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:15,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139045929] [2023-12-19 14:15:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:15,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:15,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:15,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:15,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 14:15:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:15,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 14:15:15,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:15,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:15,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204743667] [2023-12-19 14:15:15,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139045929] [2023-12-19 14:15:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139045929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:15,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:15,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:15:15,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401911622] [2023-12-19 14:15:15,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 14:15:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 14:15:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:15:15,441 INFO L87 Difference]: Start difference. First operand 294 states and 486 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:15,550 INFO L93 Difference]: Finished difference Result 875 states and 1447 transitions. [2023-12-19 14:15:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 14:15:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 587 [2023-12-19 14:15:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:15,560 INFO L225 Difference]: With dead ends: 875 [2023-12-19 14:15:15,560 INFO L226 Difference]: Without dead ends: 582 [2023-12-19 14:15:15,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:15:15,565 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 471 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:15,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 939 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 14:15:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-12-19 14:15:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 312. [2023-12-19 14:15:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 221 states have (on average 1.5294117647058822) internal successors, (338), 221 states have internal predecessors, (338), 89 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-19 14:15:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 516 transitions. [2023-12-19 14:15:15,616 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 516 transitions. Word has length 587 [2023-12-19 14:15:15,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:15,618 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 516 transitions. [2023-12-19 14:15:15,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 516 transitions. [2023-12-19 14:15:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-19 14:15:15,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:15,624 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:15,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:15,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 14:15:15,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:15,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1386779264, now seen corresponding path program 1 times [2023-12-19 14:15:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602738799] [2023-12-19 14:15:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:15,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:15,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975568109] [2023-12-19 14:15:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:15,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:15,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:15,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 14:15:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:16,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 14:15:16,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:16,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602738799] [2023-12-19 14:15:16,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975568109] [2023-12-19 14:15:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975568109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:16,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 14:15:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495696612] [2023-12-19 14:15:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:16,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:15:16,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:15:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:15:16,339 INFO L87 Difference]: Start difference. First operand 312 states and 516 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:16,722 INFO L93 Difference]: Finished difference Result 1492 states and 2462 transitions. [2023-12-19 14:15:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 14:15:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 587 [2023-12-19 14:15:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:16,729 INFO L225 Difference]: With dead ends: 1492 [2023-12-19 14:15:16,729 INFO L226 Difference]: Without dead ends: 1181 [2023-12-19 14:15:16,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:15:16,730 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 1172 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:16,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 2055 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 14:15:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2023-12-19 14:15:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1173. [2023-12-19 14:15:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 820 states have (on average 1.5) internal successors, (1230), 822 states have internal predecessors, (1230), 348 states have call successors, (348), 4 states have call predecessors, (348), 4 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1926 transitions. [2023-12-19 14:15:16,820 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1926 transitions. Word has length 587 [2023-12-19 14:15:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:16,821 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1926 transitions. [2023-12-19 14:15:16,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1926 transitions. [2023-12-19 14:15:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-19 14:15:16,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:16,826 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:16,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:17,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:17,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:17,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash 894153090, now seen corresponding path program 1 times [2023-12-19 14:15:17,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:17,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177946610] [2023-12-19 14:15:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:17,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:17,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:17,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274116407] [2023-12-19 14:15:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:17,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:17,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:17,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:17,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 14:15:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:17,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:15:17,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:17,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177946610] [2023-12-19 14:15:17,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274116407] [2023-12-19 14:15:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274116407] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:15:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324430395] [2023-12-19 14:15:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:15:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:15:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:15:17,995 INFO L87 Difference]: Start difference. First operand 1173 states and 1926 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:18,109 INFO L93 Difference]: Finished difference Result 2926 states and 4810 transitions. [2023-12-19 14:15:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:15:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 587 [2023-12-19 14:15:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:18,119 INFO L225 Difference]: With dead ends: 2926 [2023-12-19 14:15:18,119 INFO L226 Difference]: Without dead ends: 1754 [2023-12-19 14:15:18,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:15:18,123 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 199 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:18,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1564 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 14:15:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2023-12-19 14:15:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1752. [2023-12-19 14:15:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1223 states have (on average 1.4930498773507768) internal successors, (1826), 1226 states have internal predecessors, (1826), 522 states have call successors, (522), 6 states have call predecessors, (522), 6 states have return successors, (522), 519 states have call predecessors, (522), 522 states have call successors, (522) [2023-12-19 14:15:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 2870 transitions. [2023-12-19 14:15:18,252 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 2870 transitions. Word has length 587 [2023-12-19 14:15:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:18,253 INFO L495 AbstractCegarLoop]: Abstraction has 1752 states and 2870 transitions. [2023-12-19 14:15:18,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 2870 transitions. [2023-12-19 14:15:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-19 14:15:18,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:18,257 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:18,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:18,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:18,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1944064388, now seen corresponding path program 1 times [2023-12-19 14:15:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:18,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863641159] [2023-12-19 14:15:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:18,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:18,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:18,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326789873] [2023-12-19 14:15:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:18,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:18,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:18,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:18,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 14:15:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:18,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:15:18,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:18,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863641159] [2023-12-19 14:15:18,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326789873] [2023-12-19 14:15:18,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326789873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:18,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 14:15:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332337927] [2023-12-19 14:15:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:15:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:15:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:15:18,869 INFO L87 Difference]: Start difference. First operand 1752 states and 2870 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:19,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:19,025 INFO L93 Difference]: Finished difference Result 2943 states and 4825 transitions. [2023-12-19 14:15:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:15:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 587 [2023-12-19 14:15:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:19,032 INFO L225 Difference]: With dead ends: 2943 [2023-12-19 14:15:19,032 INFO L226 Difference]: Without dead ends: 1771 [2023-12-19 14:15:19,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:15:19,035 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 462 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:19,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1559 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 14:15:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-12-19 14:15:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1190. [2023-12-19 14:15:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 837 states have (on average 1.4874551971326164) internal successors, (1245), 839 states have internal predecessors, (1245), 348 states have call successors, (348), 4 states have call predecessors, (348), 4 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1941 transitions. [2023-12-19 14:15:19,129 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1941 transitions. Word has length 587 [2023-12-19 14:15:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:19,130 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1941 transitions. [2023-12-19 14:15:19,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1941 transitions. [2023-12-19 14:15:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2023-12-19 14:15:19,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:19,134 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:19,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:19,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:19,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:19,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash -332067828, now seen corresponding path program 1 times [2023-12-19 14:15:19,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:19,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879267827] [2023-12-19 14:15:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:19,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:19,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:19,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892759800] [2023-12-19 14:15:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:19,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:19,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:19,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 14:15:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:19,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:15:19,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 7920 proven. 132 refuted. 0 times theorem prover too weak. 7612 trivial. 0 not checked. [2023-12-19 14:15:20,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:20,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879267827] [2023-12-19 14:15:20,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:20,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892759800] [2023-12-19 14:15:20,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892759800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:20,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:20,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 14:15:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185064372] [2023-12-19 14:15:20,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:15:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:15:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:20,338 INFO L87 Difference]: Start difference. First operand 1190 states and 1941 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-12-19 14:15:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:21,652 INFO L93 Difference]: Finished difference Result 3476 states and 5609 transitions. [2023-12-19 14:15:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 14:15:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) Word has length 589 [2023-12-19 14:15:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:21,663 INFO L225 Difference]: With dead ends: 3476 [2023-12-19 14:15:21,664 INFO L226 Difference]: Without dead ends: 2287 [2023-12-19 14:15:21,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1169 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-19 14:15:21,668 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 590 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:21,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 2208 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-19 14:15:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2023-12-19 14:15:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1214. [2023-12-19 14:15:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 857 states have (on average 1.4609101516919487) internal successors, (1252), 859 states have internal predecessors, (1252), 348 states have call successors, (348), 8 states have call predecessors, (348), 8 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1948 transitions. [2023-12-19 14:15:21,844 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1948 transitions. Word has length 589 [2023-12-19 14:15:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1948 transitions. [2023-12-19 14:15:21,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-12-19 14:15:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1948 transitions. [2023-12-19 14:15:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2023-12-19 14:15:21,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:21,849 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:21,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-19 14:15:22,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:22,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:22,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1229461106, now seen corresponding path program 1 times [2023-12-19 14:15:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:22,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896340461] [2023-12-19 14:15:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:22,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:22,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:22,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895132640] [2023-12-19 14:15:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:22,136 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:22,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 14:15:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:22,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:15:22,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 7920 proven. 132 refuted. 0 times theorem prover too weak. 7612 trivial. 0 not checked. [2023-12-19 14:15:22,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:23,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896340461] [2023-12-19 14:15:23,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:23,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895132640] [2023-12-19 14:15:23,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895132640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:23,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:23,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 14:15:23,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152761822] [2023-12-19 14:15:23,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:23,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:15:23,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:15:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:23,153 INFO L87 Difference]: Start difference. First operand 1214 states and 1948 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-12-19 14:15:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:23,674 INFO L93 Difference]: Finished difference Result 2438 states and 3906 transitions. [2023-12-19 14:15:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 14:15:23,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) Word has length 589 [2023-12-19 14:15:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:23,681 INFO L225 Difference]: With dead ends: 2438 [2023-12-19 14:15:23,681 INFO L226 Difference]: Without dead ends: 1225 [2023-12-19 14:15:23,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 1169 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-12-19 14:15:23,684 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 551 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:23,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 933 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:15:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2023-12-19 14:15:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1209. [2023-12-19 14:15:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 852 states have (on average 1.4413145539906103) internal successors, (1228), 854 states have internal predecessors, (1228), 348 states have call successors, (348), 8 states have call predecessors, (348), 8 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1924 transitions. [2023-12-19 14:15:23,796 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1924 transitions. Word has length 589 [2023-12-19 14:15:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:23,796 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1924 transitions. [2023-12-19 14:15:23,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-12-19 14:15:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1924 transitions. [2023-12-19 14:15:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2023-12-19 14:15:23,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:23,800 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:23,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:24,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:24,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:24,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:24,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1772642993, now seen corresponding path program 1 times [2023-12-19 14:15:24,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:24,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224193823] [2023-12-19 14:15:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:24,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:24,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:24,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139910028] [2023-12-19 14:15:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:24,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:24,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:24,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:24,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 14:15:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:24,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:15:24,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 3888 proven. 36 refuted. 0 times theorem prover too weak. 11740 trivial. 0 not checked. [2023-12-19 14:15:24,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 228 proven. 36 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:24,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:24,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224193823] [2023-12-19 14:15:24,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:24,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139910028] [2023-12-19 14:15:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139910028] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:24,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:24,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 14:15:24,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545897512] [2023-12-19 14:15:24,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:24,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:15:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:15:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:24,750 INFO L87 Difference]: Start difference. First operand 1209 states and 1924 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-12-19 14:15:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:25,782 INFO L93 Difference]: Finished difference Result 3684 states and 5808 transitions. [2023-12-19 14:15:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 14:15:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) Word has length 589 [2023-12-19 14:15:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:25,791 INFO L225 Difference]: With dead ends: 3684 [2023-12-19 14:15:25,791 INFO L226 Difference]: Without dead ends: 2476 [2023-12-19 14:15:25,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1169 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-19 14:15:25,794 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 820 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:25,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 1720 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 14:15:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2023-12-19 14:15:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1395. [2023-12-19 14:15:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1034 states have (on average 1.446808510638298) internal successors, (1496), 1036 states have internal predecessors, (1496), 348 states have call successors, (348), 12 states have call predecessors, (348), 12 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2192 transitions. [2023-12-19 14:15:25,932 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2192 transitions. Word has length 589 [2023-12-19 14:15:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:25,932 INFO L495 AbstractCegarLoop]: Abstraction has 1395 states and 2192 transitions. [2023-12-19 14:15:25,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-12-19 14:15:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2192 transitions. [2023-12-19 14:15:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:25,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:25,937 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:25,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:26,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 14:15:26,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:26,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1720733677, now seen corresponding path program 1 times [2023-12-19 14:15:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:26,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032417721] [2023-12-19 14:15:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:26,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:26,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670711426] [2023-12-19 14:15:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:26,189 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:26,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 14:15:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:26,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:15:26,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:26,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:26,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032417721] [2023-12-19 14:15:26,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670711426] [2023-12-19 14:15:26,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670711426] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:26,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:26,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 14:15:26,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29364153] [2023-12-19 14:15:26,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:26,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 14:15:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 14:15:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:15:26,594 INFO L87 Difference]: Start difference. First operand 1395 states and 2192 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:27,605 INFO L93 Difference]: Finished difference Result 5955 states and 9338 transitions. [2023-12-19 14:15:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 14:15:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 590 [2023-12-19 14:15:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:27,621 INFO L225 Difference]: With dead ends: 5955 [2023-12-19 14:15:27,621 INFO L226 Difference]: Without dead ends: 4543 [2023-12-19 14:15:27,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:27,624 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 1828 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:27,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1828 Valid, 1670 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 14:15:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-12-19 14:15:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 1977. [2023-12-19 14:15:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1612 states have (on average 1.4745657568238213) internal successors, (2377), 1614 states have internal predecessors, (2377), 348 states have call successors, (348), 16 states have call predecessors, (348), 16 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 3073 transitions. [2023-12-19 14:15:27,798 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 3073 transitions. Word has length 590 [2023-12-19 14:15:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:27,798 INFO L495 AbstractCegarLoop]: Abstraction has 1977 states and 3073 transitions. [2023-12-19 14:15:27,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 3073 transitions. [2023-12-19 14:15:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:27,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:27,803 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:27,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:28,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:28,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash -721312623, now seen corresponding path program 1 times [2023-12-19 14:15:28,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:28,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614433436] [2023-12-19 14:15:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:28,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:28,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:28,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983959205] [2023-12-19 14:15:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:28,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:28,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:28,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 14:15:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:28,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:15:28,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 3888 proven. 36 refuted. 0 times theorem prover too weak. 11740 trivial. 0 not checked. [2023-12-19 14:15:28,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 228 proven. 36 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614433436] [2023-12-19 14:15:28,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983959205] [2023-12-19 14:15:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983959205] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:28,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:28,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 14:15:28,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937126036] [2023-12-19 14:15:28,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:28,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:15:28,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:15:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:28,789 INFO L87 Difference]: Start difference. First operand 1977 states and 3073 transitions. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-12-19 14:15:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:29,448 INFO L93 Difference]: Finished difference Result 3411 states and 5292 transitions. [2023-12-19 14:15:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 14:15:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) Word has length 590 [2023-12-19 14:15:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:29,453 INFO L225 Difference]: With dead ends: 3411 [2023-12-19 14:15:29,453 INFO L226 Difference]: Without dead ends: 1435 [2023-12-19 14:15:29,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1171 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-12-19 14:15:29,456 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1109 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:29,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 925 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 14:15:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2023-12-19 14:15:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1411. [2023-12-19 14:15:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1046 states have (on average 1.4158699808795412) internal successors, (1481), 1048 states have internal predecessors, (1481), 348 states have call successors, (348), 16 states have call predecessors, (348), 16 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2177 transitions. [2023-12-19 14:15:29,578 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2177 transitions. Word has length 590 [2023-12-19 14:15:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:29,579 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 2177 transitions. [2023-12-19 14:15:29,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-12-19 14:15:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2177 transitions. [2023-12-19 14:15:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:29,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:29,584 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:29,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:29,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 14:15:29,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:29,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2041185519, now seen corresponding path program 1 times [2023-12-19 14:15:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:29,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134453668] [2023-12-19 14:15:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:29,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:29,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:29,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333962518] [2023-12-19 14:15:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:29,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:29,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:29,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 14:15:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:30,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:15:30,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:30,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:30,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134453668] [2023-12-19 14:15:30,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333962518] [2023-12-19 14:15:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333962518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:30,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 14:15:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186133924] [2023-12-19 14:15:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:15:30,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:15:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:15:30,399 INFO L87 Difference]: Start difference. First operand 1411 states and 2177 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:31,556 INFO L93 Difference]: Finished difference Result 5626 states and 8733 transitions. [2023-12-19 14:15:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 14:15:31,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 590 [2023-12-19 14:15:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:31,570 INFO L225 Difference]: With dead ends: 5626 [2023-12-19 14:15:31,570 INFO L226 Difference]: Without dead ends: 4216 [2023-12-19 14:15:31,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-19 14:15:31,573 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 1793 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:31,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 2105 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 14:15:31,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2023-12-19 14:15:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 2298. [2023-12-19 14:15:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 1789 states have (on average 1.4393515930687535) internal successors, (2575), 1795 states have internal predecessors, (2575), 484 states have call successors, (484), 24 states have call predecessors, (484), 24 states have return successors, (484), 478 states have call predecessors, (484), 484 states have call successors, (484) [2023-12-19 14:15:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3543 transitions. [2023-12-19 14:15:31,745 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3543 transitions. Word has length 590 [2023-12-19 14:15:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:31,745 INFO L495 AbstractCegarLoop]: Abstraction has 2298 states and 3543 transitions. [2023-12-19 14:15:31,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3543 transitions. [2023-12-19 14:15:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:31,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:31,751 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:31,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 14:15:31,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:31,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1839361585, now seen corresponding path program 1 times [2023-12-19 14:15:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:31,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865661333] [2023-12-19 14:15:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:32,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:32,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417599039] [2023-12-19 14:15:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:32,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:32,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:32,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:32,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 14:15:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:32,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 14:15:32,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:32,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:32,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865661333] [2023-12-19 14:15:32,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417599039] [2023-12-19 14:15:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417599039] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:32,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:32,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 14:15:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742514790] [2023-12-19 14:15:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:32,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:15:32,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:15:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:15:32,476 INFO L87 Difference]: Start difference. First operand 2298 states and 3543 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:32,933 INFO L93 Difference]: Finished difference Result 5627 states and 8671 transitions. [2023-12-19 14:15:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 14:15:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 590 [2023-12-19 14:15:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:32,954 INFO L225 Difference]: With dead ends: 5627 [2023-12-19 14:15:32,954 INFO L226 Difference]: Without dead ends: 3330 [2023-12-19 14:15:32,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:15:32,958 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 786 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:32,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 1133 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:15:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2023-12-19 14:15:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 1765. [2023-12-19 14:15:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1392 states have (on average 1.401580459770115) internal successors, (1951), 1394 states have internal predecessors, (1951), 348 states have call successors, (348), 24 states have call predecessors, (348), 24 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2647 transitions. [2023-12-19 14:15:33,085 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2647 transitions. Word has length 590 [2023-12-19 14:15:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:33,086 INFO L495 AbstractCegarLoop]: Abstraction has 1765 states and 2647 transitions. [2023-12-19 14:15:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2647 transitions. [2023-12-19 14:15:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:33,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:33,090 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:33,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:33,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 14:15:33,300 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:33,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 240537939, now seen corresponding path program 1 times [2023-12-19 14:15:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719273949] [2023-12-19 14:15:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:33,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:33,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:33,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39020287] [2023-12-19 14:15:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:33,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:33,358 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:33,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 14:15:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:33,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 14:15:33,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:33,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:33,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719273949] [2023-12-19 14:15:33,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:33,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39020287] [2023-12-19 14:15:33,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39020287] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:33,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:33,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 14:15:33,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742547797] [2023-12-19 14:15:33,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:33,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:15:33,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:33,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:15:33,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:33,987 INFO L87 Difference]: Start difference. First operand 1765 states and 2647 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:35,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 14:15:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:37,164 INFO L93 Difference]: Finished difference Result 8337 states and 12765 transitions. [2023-12-19 14:15:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 14:15:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 590 [2023-12-19 14:15:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:37,177 INFO L225 Difference]: With dead ends: 8337 [2023-12-19 14:15:37,178 INFO L226 Difference]: Without dead ends: 6573 [2023-12-19 14:15:37,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2023-12-19 14:15:37,181 INFO L413 NwaCegarLoop]: 1014 mSDtfsCounter, 2303 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 966 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:37,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2303 Valid, 3187 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [966 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-19 14:15:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6573 states. [2023-12-19 14:15:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6573 to 1882. [2023-12-19 14:15:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1509 states have (on average 1.4148442677269715) internal successors, (2135), 1511 states have internal predecessors, (2135), 348 states have call successors, (348), 24 states have call predecessors, (348), 24 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2831 transitions. [2023-12-19 14:15:37,361 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2831 transitions. Word has length 590 [2023-12-19 14:15:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:37,362 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 2831 transitions. [2023-12-19 14:15:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2831 transitions. [2023-12-19 14:15:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:37,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:37,366 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:37,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:37,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 14:15:37,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:37,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -952138739, now seen corresponding path program 1 times [2023-12-19 14:15:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:37,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157549371] [2023-12-19 14:15:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:37,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590736388] [2023-12-19 14:15:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:37,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:37,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:37,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 14:15:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:38,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:15:38,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 7500 proven. 162 refuted. 0 times theorem prover too weak. 8002 trivial. 0 not checked. [2023-12-19 14:15:38,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 102 proven. 162 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:38,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157549371] [2023-12-19 14:15:38,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590736388] [2023-12-19 14:15:38,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590736388] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:38,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:38,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:15:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903584916] [2023-12-19 14:15:38,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:15:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:15:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:15:38,647 INFO L87 Difference]: Start difference. First operand 1882 states and 2831 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-12-19 14:15:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:39,186 INFO L93 Difference]: Finished difference Result 3767 states and 5646 transitions. [2023-12-19 14:15:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 14:15:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) Word has length 590 [2023-12-19 14:15:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:39,191 INFO L225 Difference]: With dead ends: 3767 [2023-12-19 14:15:39,191 INFO L226 Difference]: Without dead ends: 1886 [2023-12-19 14:15:39,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1172 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 14:15:39,193 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 267 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:39,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 932 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:15:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2023-12-19 14:15:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1834. [2023-12-19 14:15:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1457 states have (on average 1.4097460535346602) internal successors, (2054), 1459 states have internal predecessors, (2054), 348 states have call successors, (348), 28 states have call predecessors, (348), 28 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-19 14:15:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2750 transitions. [2023-12-19 14:15:39,310 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2750 transitions. Word has length 590 [2023-12-19 14:15:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:39,311 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 2750 transitions. [2023-12-19 14:15:39,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-12-19 14:15:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2750 transitions. [2023-12-19 14:15:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:39,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:39,315 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:39,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:39,524 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:39,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1127760785, now seen corresponding path program 1 times [2023-12-19 14:15:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713381229] [2023-12-19 14:15:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:39,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:39,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643858134] [2023-12-19 14:15:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:39,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:39,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:39,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 14:15:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:39,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 14:15:39,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:40,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:40,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:40,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713381229] [2023-12-19 14:15:40,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:40,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643858134] [2023-12-19 14:15:40,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643858134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:40,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:40,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 14:15:40,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018482299] [2023-12-19 14:15:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:40,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 14:15:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 14:15:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 14:15:40,656 INFO L87 Difference]: Start difference. First operand 1834 states and 2750 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:42,250 INFO L93 Difference]: Finished difference Result 5591 states and 8417 transitions. [2023-12-19 14:15:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:15:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 590 [2023-12-19 14:15:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:42,287 INFO L225 Difference]: With dead ends: 5591 [2023-12-19 14:15:42,287 INFO L226 Difference]: Without dead ends: 3758 [2023-12-19 14:15:42,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-12-19 14:15:42,292 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 754 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:42,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 2731 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 14:15:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2023-12-19 14:15:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 2637. [2023-12-19 14:15:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2072 states have (on average 1.4063706563706564) internal successors, (2914), 2075 states have internal predecessors, (2914), 522 states have call successors, (522), 42 states have call predecessors, (522), 42 states have return successors, (522), 519 states have call predecessors, (522), 522 states have call successors, (522) [2023-12-19 14:15:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3958 transitions. [2023-12-19 14:15:42,480 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3958 transitions. Word has length 590 [2023-12-19 14:15:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:42,480 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3958 transitions. [2023-12-19 14:15:42,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3958 transitions. [2023-12-19 14:15:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-12-19 14:15:42,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:42,484 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:42,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:42,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 14:15:42,692 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:42,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1482937257, now seen corresponding path program 1 times [2023-12-19 14:15:42,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:42,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531093919] [2023-12-19 14:15:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:42,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108106896] [2023-12-19 14:15:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:42,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:42,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:42,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:42,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 14:15:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:43,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:15:43,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 1278 proven. 9 refuted. 0 times theorem prover too weak. 14377 trivial. 0 not checked. [2023-12-19 14:15:43,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 255 proven. 9 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:43,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:43,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531093919] [2023-12-19 14:15:43,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:43,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108106896] [2023-12-19 14:15:43,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108106896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:43,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:43,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:15:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620906963] [2023-12-19 14:15:43,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:43,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:15:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:15:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:15:43,439 INFO L87 Difference]: Start difference. First operand 2637 states and 3958 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2023-12-19 14:15:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:43,906 INFO L93 Difference]: Finished difference Result 3554 states and 5323 transitions. [2023-12-19 14:15:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 14:15:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) Word has length 590 [2023-12-19 14:15:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:43,909 INFO L225 Difference]: With dead ends: 3554 [2023-12-19 14:15:43,909 INFO L226 Difference]: Without dead ends: 918 [2023-12-19 14:15:43,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1172 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 14:15:43,913 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 636 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:43,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 940 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:15:43,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-12-19 14:15:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 902. [2023-12-19 14:15:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 705 states have (on average 1.4070921985815603) internal successors, (992), 705 states have internal predecessors, (992), 178 states have call successors, (178), 18 states have call predecessors, (178), 18 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-19 14:15:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1348 transitions. [2023-12-19 14:15:43,977 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1348 transitions. Word has length 590 [2023-12-19 14:15:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:43,977 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1348 transitions. [2023-12-19 14:15:43,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2023-12-19 14:15:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1348 transitions. [2023-12-19 14:15:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2023-12-19 14:15:43,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:43,980 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:43,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:44,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 14:15:44,189 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:44,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1063276965, now seen corresponding path program 1 times [2023-12-19 14:15:44,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:44,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957881478] [2023-12-19 14:15:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:44,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:44,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:44,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36439188] [2023-12-19 14:15:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:44,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:44,228 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:44,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 14:15:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:44,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 14:15:44,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:45,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957881478] [2023-12-19 14:15:45,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36439188] [2023-12-19 14:15:45,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36439188] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:45,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:45,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 14:15:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36123318] [2023-12-19 14:15:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 14:15:45,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 14:15:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:15:45,123 INFO L87 Difference]: Start difference. First operand 902 states and 1348 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:45,942 INFO L93 Difference]: Finished difference Result 2121 states and 3165 transitions. [2023-12-19 14:15:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 14:15:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 591 [2023-12-19 14:15:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:45,944 INFO L225 Difference]: With dead ends: 2121 [2023-12-19 14:15:45,944 INFO L226 Difference]: Without dead ends: 1220 [2023-12-19 14:15:45,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-19 14:15:45,946 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 639 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:45,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1988 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 14:15:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-12-19 14:15:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 902. [2023-12-19 14:15:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 705 states have (on average 1.4056737588652481) internal successors, (991), 705 states have internal predecessors, (991), 178 states have call successors, (178), 18 states have call predecessors, (178), 18 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-19 14:15:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1347 transitions. [2023-12-19 14:15:46,010 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1347 transitions. Word has length 591 [2023-12-19 14:15:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:46,011 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1347 transitions. [2023-12-19 14:15:46,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1347 transitions. [2023-12-19 14:15:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2023-12-19 14:15:46,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:46,014 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:46,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 14:15:46,239 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:46,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1338036579, now seen corresponding path program 1 times [2023-12-19 14:15:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358877493] [2023-12-19 14:15:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:46,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:46,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143731319] [2023-12-19 14:15:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:46,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:46,296 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:46,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 14:15:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:46,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 14:15:46,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:47,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:47,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358877493] [2023-12-19 14:15:47,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143731319] [2023-12-19 14:15:47,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143731319] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:47,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:47,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 14:15:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919703570] [2023-12-19 14:15:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:47,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 14:15:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 14:15:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-19 14:15:47,239 INFO L87 Difference]: Start difference. First operand 902 states and 1347 transitions. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 8 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:49,012 INFO L93 Difference]: Finished difference Result 2853 states and 4264 transitions. [2023-12-19 14:15:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 14:15:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 8 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 591 [2023-12-19 14:15:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:49,016 INFO L225 Difference]: With dead ends: 2853 [2023-12-19 14:15:49,016 INFO L226 Difference]: Without dead ends: 1936 [2023-12-19 14:15:49,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-12-19 14:15:49,018 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 2486 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:49,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2486 Valid, 3365 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-19 14:15:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2023-12-19 14:15:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 919. [2023-12-19 14:15:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 722 states have (on average 1.3988919667590027) internal successors, (1010), 722 states have internal predecessors, (1010), 178 states have call successors, (178), 18 states have call predecessors, (178), 18 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-19 14:15:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1366 transitions. [2023-12-19 14:15:49,089 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1366 transitions. Word has length 591 [2023-12-19 14:15:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:49,089 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1366 transitions. [2023-12-19 14:15:49,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 8 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1366 transitions. [2023-12-19 14:15:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2023-12-19 14:15:49,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:49,093 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:49,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-19 14:15:49,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 14:15:49,301 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:49,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1028658015, now seen corresponding path program 1 times [2023-12-19 14:15:49,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:49,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409461200] [2023-12-19 14:15:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:49,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:49,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510818425] [2023-12-19 14:15:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:49,342 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:49,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 14:15:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:49,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 14:15:49,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:15:50,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:15:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409461200] [2023-12-19 14:15:50,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510818425] [2023-12-19 14:15:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510818425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:15:50,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:15:50,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 14:15:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597852068] [2023-12-19 14:15:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:15:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 14:15:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 14:15:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-19 14:15:50,400 INFO L87 Difference]: Start difference. First operand 919 states and 1366 transitions. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 8 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:51,731 INFO L93 Difference]: Finished difference Result 2015 states and 3005 transitions. [2023-12-19 14:15:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 14:15:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 8 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 591 [2023-12-19 14:15:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:51,734 INFO L225 Difference]: With dead ends: 2015 [2023-12-19 14:15:51,734 INFO L226 Difference]: Without dead ends: 1091 [2023-12-19 14:15:51,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-12-19 14:15:51,736 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 967 mSDsluCounter, 1973 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:51,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 2575 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-19 14:15:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2023-12-19 14:15:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 900. [2023-12-19 14:15:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 703 states have (on average 1.3982930298719773) internal successors, (983), 703 states have internal predecessors, (983), 178 states have call successors, (178), 18 states have call predecessors, (178), 18 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-19 14:15:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1339 transitions. [2023-12-19 14:15:51,803 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1339 transitions. Word has length 591 [2023-12-19 14:15:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:51,803 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1339 transitions. [2023-12-19 14:15:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 8 states have internal predecessors, (149), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:15:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1339 transitions. [2023-12-19 14:15:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2023-12-19 14:15:51,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:51,808 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:51,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:52,016 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:52,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash 920639973, now seen corresponding path program 1 times [2023-12-19 14:15:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956661807] [2023-12-19 14:15:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:52,067 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:52,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641462374] [2023-12-19 14:15:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:52,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:52,080 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:52,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 14:15:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:52,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:15:52,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 7500 proven. 162 refuted. 0 times theorem prover too weak. 8002 trivial. 0 not checked. [2023-12-19 14:15:52,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 102 proven. 162 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:53,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956661807] [2023-12-19 14:15:53,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:53,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641462374] [2023-12-19 14:15:53,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641462374] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:53,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 14:15:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028226365] [2023-12-19 14:15:53,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:53,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:15:53,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:15:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:15:53,179 INFO L87 Difference]: Start difference. First operand 900 states and 1339 transitions. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-12-19 14:15:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:15:54,045 INFO L93 Difference]: Finished difference Result 1927 states and 2857 transitions. [2023-12-19 14:15:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 14:15:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) Word has length 591 [2023-12-19 14:15:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:15:54,048 INFO L225 Difference]: With dead ends: 1927 [2023-12-19 14:15:54,048 INFO L226 Difference]: Without dead ends: 1028 [2023-12-19 14:15:54,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1191 GetRequests, 1173 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-12-19 14:15:54,050 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 820 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 14:15:54,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1417 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 14:15:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2023-12-19 14:15:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 810. [2023-12-19 14:15:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 613 states have (on average 1.3866231647634584) internal successors, (850), 613 states have internal predecessors, (850), 178 states have call successors, (178), 18 states have call predecessors, (178), 18 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-19 14:15:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1206 transitions. [2023-12-19 14:15:54,121 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1206 transitions. Word has length 591 [2023-12-19 14:15:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:15:54,122 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1206 transitions. [2023-12-19 14:15:54,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-12-19 14:15:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1206 transitions. [2023-12-19 14:15:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-19 14:15:54,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:15:54,125 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:15:54,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 14:15:54,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:54,334 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:15:54,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:15:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1128370885, now seen corresponding path program 1 times [2023-12-19 14:15:54,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:15:54,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669953343] [2023-12-19 14:15:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:54,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:15:54,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:15:54,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965405113] [2023-12-19 14:15:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:15:54,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:15:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:15:54,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:15:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 14:15:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:15:54,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 14:15:54,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:15:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 3760 proven. 228 refuted. 0 times theorem prover too weak. 11676 trivial. 0 not checked. [2023-12-19 14:15:56,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:15:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 36 proven. 228 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:15:57,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:15:57,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669953343] [2023-12-19 14:15:57,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:15:57,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965405113] [2023-12-19 14:15:57,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965405113] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:15:57,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:15:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2023-12-19 14:15:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193545277] [2023-12-19 14:15:57,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:15:57,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 14:15:57,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:15:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 14:15:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-12-19 14:15:57,150 INFO L87 Difference]: Start difference. First operand 810 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 21.846153846153847) internal successors, (284), 13 states have internal predecessors, (284), 4 states have call successors, (178), 3 states have call predecessors, (178), 5 states have return successors, (178), 4 states have call predecessors, (178), 4 states have call successors, (178) [2023-12-19 14:16:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:16:00,223 INFO L93 Difference]: Finished difference Result 3610 states and 5380 transitions. [2023-12-19 14:16:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 14:16:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.846153846153847) internal successors, (284), 13 states have internal predecessors, (284), 4 states have call successors, (178), 3 states have call predecessors, (178), 5 states have return successors, (178), 4 states have call predecessors, (178), 4 states have call successors, (178) Word has length 592 [2023-12-19 14:16:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:16:00,242 INFO L225 Difference]: With dead ends: 3610 [2023-12-19 14:16:00,242 INFO L226 Difference]: Without dead ends: 2801 [2023-12-19 14:16:00,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1191 GetRequests, 1173 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2023-12-19 14:16:00,245 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 2259 mSDsluCounter, 2323 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 3134 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-19 14:16:00,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2347 Valid, 3134 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-19 14:16:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2023-12-19 14:16:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2526. [2023-12-19 14:16:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2034 states have (on average 1.4242871189773845) internal successors, (2897), 2034 states have internal predecessors, (2897), 445 states have call successors, (445), 46 states have call predecessors, (445), 46 states have return successors, (445), 445 states have call predecessors, (445), 445 states have call successors, (445) [2023-12-19 14:16:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 3787 transitions. [2023-12-19 14:16:00,488 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 3787 transitions. Word has length 592 [2023-12-19 14:16:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:16:00,488 INFO L495 AbstractCegarLoop]: Abstraction has 2526 states and 3787 transitions. [2023-12-19 14:16:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.846153846153847) internal successors, (284), 13 states have internal predecessors, (284), 4 states have call successors, (178), 3 states have call predecessors, (178), 5 states have return successors, (178), 4 states have call predecessors, (178), 4 states have call successors, (178) [2023-12-19 14:16:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 3787 transitions. [2023-12-19 14:16:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-19 14:16:00,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:16:00,492 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:16:00,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 14:16:00,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:00,700 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:16:00,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:16:00,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1226014397, now seen corresponding path program 1 times [2023-12-19 14:16:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:16:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168044709] [2023-12-19 14:16:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:00,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:16:00,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:16:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196625548] [2023-12-19 14:16:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:00,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:16:00,745 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:16:00,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 14:16:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:16:01,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 14:16:01,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:16:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 9958 proven. 117 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2023-12-19 14:16:02,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:16:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 147 proven. 117 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:16:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:16:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168044709] [2023-12-19 14:16:03,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:16:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196625548] [2023-12-19 14:16:03,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196625548] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:16:03,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:16:03,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-12-19 14:16:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600263754] [2023-12-19 14:16:03,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:16:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 14:16:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:16:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 14:16:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-12-19 14:16:03,997 INFO L87 Difference]: Start difference. First operand 2526 states and 3787 transitions. Second operand has 20 states, 20 states have (on average 14.5) internal successors, (290), 20 states have internal predecessors, (290), 6 states have call successors, (178), 4 states have call predecessors, (178), 6 states have return successors, (178), 6 states have call predecessors, (178), 6 states have call successors, (178) [2023-12-19 14:16:10,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 14:16:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:16:14,456 INFO L93 Difference]: Finished difference Result 17970 states and 27210 transitions. [2023-12-19 14:16:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-19 14:16:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 14.5) internal successors, (290), 20 states have internal predecessors, (290), 6 states have call successors, (178), 4 states have call predecessors, (178), 6 states have return successors, (178), 6 states have call predecessors, (178), 6 states have call successors, (178) Word has length 592 [2023-12-19 14:16:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:16:14,479 INFO L225 Difference]: With dead ends: 17970 [2023-12-19 14:16:14,479 INFO L226 Difference]: Without dead ends: 15960 [2023-12-19 14:16:14,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=878, Invalid=2202, Unknown=0, NotChecked=0, Total=3080 [2023-12-19 14:16:14,484 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 5876 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5984 SdHoareTripleChecker+Valid, 4771 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:16:14,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5984 Valid, 4771 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 3656 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2023-12-19 14:16:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15960 states. [2023-12-19 14:16:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15960 to 11921. [2023-12-19 14:16:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11921 states, 10519 states have (on average 1.4759007510219602) internal successors, (15525), 10531 states have internal predecessors, (15525), 1253 states have call successors, (1253), 148 states have call predecessors, (1253), 148 states have return successors, (1253), 1241 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-12-19 14:16:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11921 states to 11921 states and 18031 transitions. [2023-12-19 14:16:15,265 INFO L78 Accepts]: Start accepts. Automaton has 11921 states and 18031 transitions. Word has length 592 [2023-12-19 14:16:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:16:15,266 INFO L495 AbstractCegarLoop]: Abstraction has 11921 states and 18031 transitions. [2023-12-19 14:16:15,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.5) internal successors, (290), 20 states have internal predecessors, (290), 6 states have call successors, (178), 4 states have call predecessors, (178), 6 states have return successors, (178), 6 states have call predecessors, (178), 6 states have call successors, (178) [2023-12-19 14:16:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11921 states and 18031 transitions. [2023-12-19 14:16:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-19 14:16:15,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:16:15,271 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:16:15,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 14:16:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:15,479 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:16:15,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:16:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1008064395, now seen corresponding path program 1 times [2023-12-19 14:16:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:16:15,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607217275] [2023-12-19 14:16:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:16:15,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:16:15,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261064116] [2023-12-19 14:16:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:16:15,521 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:16:15,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 14:16:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:16:16,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:16:16,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:16:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 5940 proven. 198 refuted. 0 times theorem prover too weak. 9526 trivial. 0 not checked. [2023-12-19 14:16:17,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:16:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 66 proven. 198 refuted. 0 times theorem prover too weak. 15400 trivial. 0 not checked. [2023-12-19 14:16:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:16:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607217275] [2023-12-19 14:16:17,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:16:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261064116] [2023-12-19 14:16:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261064116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:16:17,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:16:17,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-19 14:16:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422630154] [2023-12-19 14:16:17,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:16:17,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 14:16:17,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:16:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 14:16:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-12-19 14:16:17,732 INFO L87 Difference]: Start difference. First operand 11921 states and 18031 transitions. Second operand has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 4 states have call successors, (178), 3 states have call predecessors, (178), 5 states have return successors, (178), 4 states have call predecessors, (178), 4 states have call successors, (178) [2023-12-19 14:16:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:16:22,398 INFO L93 Difference]: Finished difference Result 44792 states and 67588 transitions. [2023-12-19 14:16:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 14:16:22,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 4 states have call successors, (178), 3 states have call predecessors, (178), 5 states have return successors, (178), 4 states have call predecessors, (178), 4 states have call successors, (178) Word has length 592 [2023-12-19 14:16:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:16:22,447 INFO L225 Difference]: With dead ends: 44792 [2023-12-19 14:16:22,447 INFO L226 Difference]: Without dead ends: 34497 [2023-12-19 14:16:22,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1174 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-12-19 14:16:22,461 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1081 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:16:22,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 2187 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-19 14:16:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34497 states. [2023-12-19 14:16:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34497 to 32587. [2023-12-19 14:16:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32587 states, 28560 states have (on average 1.464705882352941) internal successors, (41832), 28596 states have internal predecessors, (41832), 3581 states have call successors, (3581), 445 states have call predecessors, (3581), 445 states have return successors, (3581), 3545 states have call predecessors, (3581), 3581 states have call successors, (3581) [2023-12-19 14:16:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32587 states to 32587 states and 48994 transitions. [2023-12-19 14:16:24,963 INFO L78 Accepts]: Start accepts. Automaton has 32587 states and 48994 transitions. Word has length 592 [2023-12-19 14:16:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:16:24,963 INFO L495 AbstractCegarLoop]: Abstraction has 32587 states and 48994 transitions. [2023-12-19 14:16:24,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 4 states have call successors, (178), 3 states have call predecessors, (178), 5 states have return successors, (178), 4 states have call predecessors, (178), 4 states have call successors, (178) [2023-12-19 14:16:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32587 states and 48994 transitions. [2023-12-19 14:16:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-19 14:16:24,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:16:24,970 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:16:24,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-19 14:16:25,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:25,180 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:16:25,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:16:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1597959159, now seen corresponding path program 1 times [2023-12-19 14:16:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:16:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143210118] [2023-12-19 14:16:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:25,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:16:25,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:16:25,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620201217] [2023-12-19 14:16:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:16:25,226 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:16:25,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 14:16:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:16:25,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 14:16:25,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:16:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 3643 proven. 60 refuted. 0 times theorem prover too weak. 11961 trivial. 0 not checked. [2023-12-19 14:16:26,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:16:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 462 proven. 63 refuted. 0 times theorem prover too weak. 15139 trivial. 0 not checked. [2023-12-19 14:16:26,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:16:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143210118] [2023-12-19 14:16:26,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:16:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620201217] [2023-12-19 14:16:26,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620201217] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:16:26,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:16:26,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-12-19 14:16:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713035446] [2023-12-19 14:16:26,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:16:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 14:16:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:16:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 14:16:26,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-12-19 14:16:26,467 INFO L87 Difference]: Start difference. First operand 32587 states and 48994 transitions. Second operand has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 16 states have internal predecessors, (218), 5 states have call successors, (100), 3 states have call predecessors, (100), 6 states have return successors, (101), 5 states have call predecessors, (101), 5 states have call successors, (101) [2023-12-19 14:16:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:16:30,345 INFO L93 Difference]: Finished difference Result 66515 states and 99560 transitions. [2023-12-19 14:16:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 14:16:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 16 states have internal predecessors, (218), 5 states have call successors, (100), 3 states have call predecessors, (100), 6 states have return successors, (101), 5 states have call predecessors, (101), 5 states have call successors, (101) Word has length 592 [2023-12-19 14:16:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:16:30,400 INFO L225 Difference]: With dead ends: 66515 [2023-12-19 14:16:30,400 INFO L226 Difference]: Without dead ends: 34924 [2023-12-19 14:16:30,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2023-12-19 14:16:30,437 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 1982 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:16:30,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1982 Valid, 2385 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-19 14:16:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34924 states. [2023-12-19 14:16:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34924 to 32421. [2023-12-19 14:16:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32421 states, 28320 states have (on average 1.4523305084745763) internal successors, (41130), 28356 states have internal predecessors, (41130), 3581 states have call successors, (3581), 519 states have call predecessors, (3581), 519 states have return successors, (3581), 3545 states have call predecessors, (3581), 3581 states have call successors, (3581) [2023-12-19 14:16:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32421 states to 32421 states and 48292 transitions. [2023-12-19 14:16:32,964 INFO L78 Accepts]: Start accepts. Automaton has 32421 states and 48292 transitions. Word has length 592 [2023-12-19 14:16:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:16:32,964 INFO L495 AbstractCegarLoop]: Abstraction has 32421 states and 48292 transitions. [2023-12-19 14:16:32,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 16 states have internal predecessors, (218), 5 states have call successors, (100), 3 states have call predecessors, (100), 6 states have return successors, (101), 5 states have call predecessors, (101), 5 states have call successors, (101) [2023-12-19 14:16:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 32421 states and 48292 transitions. [2023-12-19 14:16:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2023-12-19 14:16:32,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:16:32,971 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:16:32,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 14:16:33,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:33,179 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:16:33,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:16:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1951047541, now seen corresponding path program 1 times [2023-12-19 14:16:33,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:16:33,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130079350] [2023-12-19 14:16:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:16:33,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:16:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476076953] [2023-12-19 14:16:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:33,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:33,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:16:33,220 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:16:33,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 14:16:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:16:33,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 14:16:33,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:16:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 10422 proven. 360 refuted. 0 times theorem prover too weak. 4882 trivial. 0 not checked. [2023-12-19 14:16:35,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:16:36,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:16:36,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130079350] [2023-12-19 14:16:36,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:16:36,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476076953] [2023-12-19 14:16:36,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476076953] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 14:16:36,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 14:16:36,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-19 14:16:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950582550] [2023-12-19 14:16:36,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 14:16:36,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 14:16:36,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:16:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 14:16:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2023-12-19 14:16:36,316 INFO L87 Difference]: Start difference. First operand 32421 states and 48292 transitions. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 4 states have call successors, (89), 4 states have call predecessors, (89), 6 states have return successors, (89), 4 states have call predecessors, (89), 4 states have call successors, (89) [2023-12-19 14:16:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:16:46,767 INFO L93 Difference]: Finished difference Result 117976 states and 174608 transitions. [2023-12-19 14:16:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 14:16:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 4 states have call successors, (89), 4 states have call predecessors, (89), 6 states have return successors, (89), 4 states have call predecessors, (89), 4 states have call successors, (89) Word has length 592 [2023-12-19 14:16:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:16:46,892 INFO L225 Difference]: With dead ends: 117976 [2023-12-19 14:16:46,892 INFO L226 Difference]: Without dead ends: 97456 [2023-12-19 14:16:46,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 988 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=551, Invalid=1341, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 14:16:46,919 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 674 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:16:46,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 3518 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2817 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-19 14:16:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97456 states. [2023-12-19 14:16:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97456 to 83567. [2023-12-19 14:16:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83567 states, 75322 states have (on average 1.4694777090358726) internal successors, (110684), 75394 states have internal predecessors, (110684), 7073 states have call successors, (7073), 1171 states have call predecessors, (7073), 1171 states have return successors, (7073), 7001 states have call predecessors, (7073), 7073 states have call successors, (7073) [2023-12-19 14:16:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83567 states to 83567 states and 124830 transitions. [2023-12-19 14:16:52,462 INFO L78 Accepts]: Start accepts. Automaton has 83567 states and 124830 transitions. Word has length 592 [2023-12-19 14:16:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:16:52,463 INFO L495 AbstractCegarLoop]: Abstraction has 83567 states and 124830 transitions. [2023-12-19 14:16:52,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 4 states have call successors, (89), 4 states have call predecessors, (89), 6 states have return successors, (89), 4 states have call predecessors, (89), 4 states have call successors, (89) [2023-12-19 14:16:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 83567 states and 124830 transitions. [2023-12-19 14:16:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2023-12-19 14:16:52,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:16:52,476 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:16:52,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 14:16:52,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-19 14:16:52,687 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:16:52,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:16:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1773537682, now seen corresponding path program 1 times [2023-12-19 14:16:52,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:16:52,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565853865] [2023-12-19 14:16:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:16:52,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:16:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089893080] [2023-12-19 14:16:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:16:52,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:16:52,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:16:52,955 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:16:52,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 14:16:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:16:53,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 14:16:53,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:16:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-12-19 14:16:54,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:16:54,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:16:54,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565853865] [2023-12-19 14:16:54,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:16:54,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089893080] [2023-12-19 14:16:54,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089893080] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:16:54,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:16:54,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 14:16:54,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537193928] [2023-12-19 14:16:54,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:16:54,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 14:16:54,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:16:54,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 14:16:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:16:54,009 INFO L87 Difference]: Start difference. First operand 83567 states and 124830 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:16:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:16:59,360 INFO L93 Difference]: Finished difference Result 166802 states and 249030 transitions. [2023-12-19 14:16:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 14:16:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) Word has length 593 [2023-12-19 14:16:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:16:59,505 INFO L225 Difference]: With dead ends: 166802 [2023-12-19 14:16:59,505 INFO L226 Difference]: Without dead ends: 83568 [2023-12-19 14:16:59,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:16:59,569 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 475 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:16:59,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1843 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:16:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83568 states. [2023-12-19 14:17:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83568 to 82304. [2023-12-19 14:17:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82304 states, 74059 states have (on average 1.4677216813621572) internal successors, (108698), 74131 states have internal predecessors, (108698), 7073 states have call successors, (7073), 1171 states have call predecessors, (7073), 1171 states have return successors, (7073), 7001 states have call predecessors, (7073), 7073 states have call successors, (7073) [2023-12-19 14:17:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82304 states to 82304 states and 122844 transitions. [2023-12-19 14:17:05,309 INFO L78 Accepts]: Start accepts. Automaton has 82304 states and 122844 transitions. Word has length 593 [2023-12-19 14:17:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:17:05,309 INFO L495 AbstractCegarLoop]: Abstraction has 82304 states and 122844 transitions. [2023-12-19 14:17:05,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (89), 1 states have call predecessors, (89), 1 states have return successors, (89), 1 states have call predecessors, (89), 1 states have call successors, (89) [2023-12-19 14:17:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 82304 states and 122844 transitions. [2023-12-19 14:17:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2023-12-19 14:17:05,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:17:05,316 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:17:05,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 14:17:05,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-19 14:17:05,524 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:17:05,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:17:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1657155370, now seen corresponding path program 1 times [2023-12-19 14:17:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:17:05,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690465029] [2023-12-19 14:17:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:17:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:17:05,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:17:05,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661662509] [2023-12-19 14:17:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:17:05,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:17:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:17:05,562 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:17:05,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 14:17:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:17:06,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 14:17:06,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:17:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 8598 proven. 744 refuted. 0 times theorem prover too weak. 6322 trivial. 0 not checked. [2023-12-19 14:17:08,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:17:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 276 proven. 762 refuted. 0 times theorem prover too weak. 14626 trivial. 0 not checked. [2023-12-19 14:17:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:17:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690465029] [2023-12-19 14:17:12,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:17:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661662509] [2023-12-19 14:17:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661662509] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:17:12,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:17:12,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2023-12-19 14:17:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487754671] [2023-12-19 14:17:12,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:17:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-19 14:17:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:17:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-19 14:17:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2023-12-19 14:17:12,908 INFO L87 Difference]: Start difference. First operand 82304 states and 122844 transitions. Second operand has 37 states, 35 states have (on average 8.628571428571428) internal successors, (302), 33 states have internal predecessors, (302), 10 states have call successors, (178), 6 states have call predecessors, (178), 12 states have return successors, (178), 10 states have call predecessors, (178), 10 states have call successors, (178) [2023-12-19 14:17:52,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-19 14:18:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:18:35,552 INFO L93 Difference]: Finished difference Result 332135 states and 490819 transitions. [2023-12-19 14:18:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-19 14:18:35,553 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 8.628571428571428) internal successors, (302), 33 states have internal predecessors, (302), 10 states have call successors, (178), 6 states have call predecessors, (178), 12 states have return successors, (178), 10 states have call predecessors, (178), 10 states have call successors, (178) Word has length 593 [2023-12-19 14:18:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:18:36,308 INFO L225 Difference]: With dead ends: 332135 [2023-12-19 14:18:36,309 INFO L226 Difference]: Without dead ends: 251478 [2023-12-19 14:18:36,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1305 GetRequests, 1165 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8089 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=4099, Invalid=15923, Unknown=0, NotChecked=0, Total=20022 [2023-12-19 14:18:36,396 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 16440 mSDsluCounter, 6025 mSDsCounter, 0 mSdLazyCounter, 6252 mSolverCounterSat, 5145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16441 SdHoareTripleChecker+Valid, 6606 SdHoareTripleChecker+Invalid, 11397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5145 IncrementalHoareTripleChecker+Valid, 6252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2023-12-19 14:18:36,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16441 Valid, 6606 Invalid, 11397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5145 Valid, 6252 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2023-12-19 14:18:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251478 states. [2023-12-19 14:18:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251478 to 154512. [2023-12-19 14:18:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154512 states, 136470 states have (on average 1.4505019418187148) internal successors, (197950), 136746 states have internal predecessors, (197950), 15377 states have call successors, (15377), 2664 states have call predecessors, (15377), 2664 states have return successors, (15377), 15101 states have call predecessors, (15377), 15377 states have call successors, (15377) [2023-12-19 14:18:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154512 states to 154512 states and 228704 transitions. [2023-12-19 14:18:58,941 INFO L78 Accepts]: Start accepts. Automaton has 154512 states and 228704 transitions. Word has length 593 [2023-12-19 14:18:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:18:58,942 INFO L495 AbstractCegarLoop]: Abstraction has 154512 states and 228704 transitions. [2023-12-19 14:18:58,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 8.628571428571428) internal successors, (302), 33 states have internal predecessors, (302), 10 states have call successors, (178), 6 states have call predecessors, (178), 12 states have return successors, (178), 10 states have call predecessors, (178), 10 states have call successors, (178) [2023-12-19 14:18:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 154512 states and 228704 transitions. [2023-12-19 14:18:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2023-12-19 14:18:58,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:18:58,954 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:18:58,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-19 14:18:59,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-19 14:18:59,155 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:18:59,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:18:59,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1239773142, now seen corresponding path program 1 times [2023-12-19 14:18:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:18:59,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396622304] [2023-12-19 14:18:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:18:59,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:18:59,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:18:59,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032892474] [2023-12-19 14:18:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:18:59,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:18:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:18:59,195 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:18:59,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 14:19:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:19:00,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 14:19:00,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:19:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 2517 proven. 732 refuted. 0 times theorem prover too weak. 12415 trivial. 0 not checked. [2023-12-19 14:19:01,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:19:03,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:19:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396622304] [2023-12-19 14:19:03,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:19:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032892474] [2023-12-19 14:19:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032892474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 14:19:03,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 14:19:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-19 14:19:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380143027] [2023-12-19 14:19:03,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 14:19:03,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 14:19:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:19:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 14:19:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-12-19 14:19:03,787 INFO L87 Difference]: Start difference. First operand 154512 states and 228704 transitions. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 4 states have call successors, (89), 4 states have call predecessors, (89), 5 states have return successors, (89), 3 states have call predecessors, (89), 4 states have call successors, (89) [2023-12-19 14:19:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:19:25,501 INFO L93 Difference]: Finished difference Result 311077 states and 457150 transitions. [2023-12-19 14:19:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 14:19:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 4 states have call successors, (89), 4 states have call predecessors, (89), 5 states have return successors, (89), 3 states have call predecessors, (89), 4 states have call successors, (89) Word has length 593 [2023-12-19 14:19:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:19:25,759 INFO L225 Difference]: With dead ends: 311077 [2023-12-19 14:19:25,759 INFO L226 Difference]: Without dead ends: 159352 [2023-12-19 14:19:26,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1140 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-12-19 14:19:26,086 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 182 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:19:26,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1435 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 14:19:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159352 states. [2023-12-19 14:19:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159352 to 157308. [2023-12-19 14:19:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157308 states, 138783 states have (on average 1.4304850017653459) internal successors, (198527), 139059 states have internal predecessors, (198527), 15041 states have call successors, (15041), 3483 states have call predecessors, (15041), 3483 states have return successors, (15041), 14765 states have call predecessors, (15041), 15041 states have call successors, (15041) [2023-12-19 14:19:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157308 states to 157308 states and 228609 transitions. [2023-12-19 14:19:47,033 INFO L78 Accepts]: Start accepts. Automaton has 157308 states and 228609 transitions. Word has length 593 [2023-12-19 14:19:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:19:47,034 INFO L495 AbstractCegarLoop]: Abstraction has 157308 states and 228609 transitions. [2023-12-19 14:19:47,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 4 states have call successors, (89), 4 states have call predecessors, (89), 5 states have return successors, (89), 3 states have call predecessors, (89), 4 states have call successors, (89) [2023-12-19 14:19:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 157308 states and 228609 transitions. [2023-12-19 14:19:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-19 14:19:47,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:19:47,046 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:19:47,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-19 14:19:47,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-19 14:19:47,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:19:47,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:19:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash 941482891, now seen corresponding path program 1 times [2023-12-19 14:19:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:19:47,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054047238] [2023-12-19 14:19:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:19:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:19:47,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:19:47,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587013372] [2023-12-19 14:19:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:19:47,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:19:47,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:19:47,338 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:19:47,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 14:19:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:19:52,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-19 14:19:52,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:19:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 10159 proven. 1296 refuted. 0 times theorem prover too weak. 4209 trivial. 0 not checked. [2023-12-19 14:19:57,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:19:58,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:19:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054047238] [2023-12-19 14:19:58,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:19:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587013372] [2023-12-19 14:19:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587013372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 14:19:58,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 14:19:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-12-19 14:19:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648924929] [2023-12-19 14:19:58,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 14:19:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 14:19:58,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:19:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 14:19:58,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 14:19:58,257 INFO L87 Difference]: Start difference. First operand 157308 states and 228609 transitions. Second operand has 33 states, 33 states have (on average 5.696969696969697) internal successors, (188), 29 states have internal predecessors, (188), 9 states have call successors, (89), 9 states have call predecessors, (89), 13 states have return successors, (89), 9 states have call predecessors, (89), 9 states have call successors, (89) [2023-12-19 14:20:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:20:28,515 INFO L93 Difference]: Finished difference Result 342257 states and 494060 transitions. [2023-12-19 14:20:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-19 14:20:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.696969696969697) internal successors, (188), 29 states have internal predecessors, (188), 9 states have call successors, (89), 9 states have call predecessors, (89), 13 states have return successors, (89), 9 states have call predecessors, (89), 9 states have call successors, (89) Word has length 594 [2023-12-19 14:20:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:20:29,014 INFO L225 Difference]: With dead ends: 342257 [2023-12-19 14:20:29,014 INFO L226 Difference]: Without dead ends: 187388 [2023-12-19 14:20:29,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1694, Invalid=5962, Unknown=0, NotChecked=0, Total=7656 [2023-12-19 14:20:29,132 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 3494 mSDsluCounter, 4389 mSDsCounter, 0 mSdLazyCounter, 3661 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 4726 SdHoareTripleChecker+Invalid, 4103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-19 14:20:29,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3494 Valid, 4726 Invalid, 4103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3661 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-19 14:20:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187388 states. [2023-12-19 14:20:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187388 to 175964. [2023-12-19 14:20:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175964 states, 155235 states have (on average 1.4218700679614777) internal successors, (220724), 155643 states have internal predecessors, (220724), 16577 states have call successors, (16577), 4151 states have call predecessors, (16577), 4151 states have return successors, (16577), 16169 states have call predecessors, (16577), 16577 states have call successors, (16577) [2023-12-19 14:20:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175964 states to 175964 states and 253878 transitions. [2023-12-19 14:20:53,204 INFO L78 Accepts]: Start accepts. Automaton has 175964 states and 253878 transitions. Word has length 594 [2023-12-19 14:20:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:20:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 175964 states and 253878 transitions. [2023-12-19 14:20:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.696969696969697) internal successors, (188), 29 states have internal predecessors, (188), 9 states have call successors, (89), 9 states have call predecessors, (89), 13 states have return successors, (89), 9 states have call predecessors, (89), 9 states have call successors, (89) [2023-12-19 14:20:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 175964 states and 253878 transitions. [2023-12-19 14:20:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-19 14:20:53,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:20:53,226 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:20:53,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-19 14:20:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-19 14:20:53,438 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:20:53,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:20:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash -903884275, now seen corresponding path program 1 times [2023-12-19 14:20:53,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:20:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218338948] [2023-12-19 14:20:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:20:53,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:20:53,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:20:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499649027] [2023-12-19 14:20:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:20:53,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:20:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:20:53,540 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:20:53,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-19 14:20:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:20:58,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-19 14:20:58,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 12675 proven. 864 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2023-12-19 14:21:06,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:25,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218338948] [2023-12-19 14:22:25,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499649027] [2023-12-19 14:22:25,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499649027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 14:22:25,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 14:22:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-12-19 14:22:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537095014] [2023-12-19 14:22:25,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 14:22:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 14:22:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1833, Unknown=1, NotChecked=0, Total=2256 [2023-12-19 14:22:25,597 INFO L87 Difference]: Start difference. First operand 175964 states and 253878 transitions. Second operand has 32 states, 32 states have (on average 6.15625) internal successors, (197), 29 states have internal predecessors, (197), 10 states have call successors, (89), 10 states have call predecessors, (89), 16 states have return successors, (89), 10 states have call predecessors, (89), 10 states have call successors, (89) [2023-12-19 14:23:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:11,390 INFO L93 Difference]: Finished difference Result 313280 states and 453969 transitions. [2023-12-19 14:23:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-19 14:23:11,391 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.15625) internal successors, (197), 29 states have internal predecessors, (197), 10 states have call successors, (89), 10 states have call predecessors, (89), 16 states have return successors, (89), 10 states have call predecessors, (89), 10 states have call successors, (89) Word has length 594 [2023-12-19 14:23:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:11,712 INFO L225 Difference]: With dead ends: 313280 [2023-12-19 14:23:11,712 INFO L226 Difference]: Without dead ends: 175579 [2023-12-19 14:23:12,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 721 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 58.4s TimeCoverageRelationStatistics Valid=1505, Invalid=5976, Unknown=1, NotChecked=0, Total=7482 [2023-12-19 14:23:12,046 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1919 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 3430 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:12,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1919 Valid, 3430 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-19 14:23:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175579 states. [2023-12-19 14:23:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175579 to 175563. [2023-12-19 14:23:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175563 states, 154820 states have (on average 1.421463635189252) internal successors, (220071), 155228 states have internal predecessors, (220071), 16577 states have call successors, (16577), 4165 states have call predecessors, (16577), 4165 states have return successors, (16577), 16169 states have call predecessors, (16577), 16577 states have call successors, (16577) [2023-12-19 14:23:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175563 states to 175563 states and 253225 transitions. [2023-12-19 14:23:36,058 INFO L78 Accepts]: Start accepts. Automaton has 175563 states and 253225 transitions. Word has length 594 [2023-12-19 14:23:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:36,058 INFO L495 AbstractCegarLoop]: Abstraction has 175563 states and 253225 transitions. [2023-12-19 14:23:36,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.15625) internal successors, (197), 29 states have internal predecessors, (197), 10 states have call successors, (89), 10 states have call predecessors, (89), 16 states have return successors, (89), 10 states have call predecessors, (89), 10 states have call successors, (89) [2023-12-19 14:23:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 175563 states and 253225 transitions. [2023-12-19 14:23:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-19 14:23:36,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:36,333 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:23:36,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-19 14:23:36,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:36,533 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:36,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash 99691605, now seen corresponding path program 1 times [2023-12-19 14:23:36,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:36,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401967669] [2023-12-19 14:23:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:36,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:36,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:36,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653767327] [2023-12-19 14:23:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:36,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:36,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:36,596 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:23:36,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-19 14:23:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:45,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 14:23:45,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 7648 proven. 156 refuted. 0 times theorem prover too weak. 7860 trivial. 0 not checked. [2023-12-19 14:23:46,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:23:51,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:51,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401967669] [2023-12-19 14:23:51,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:51,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653767327] [2023-12-19 14:23:51,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653767327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 14:23:51,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 14:23:51,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-19 14:23:51,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452619866] [2023-12-19 14:23:51,193 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 14:23:51,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 14:23:51,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:51,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 14:23:51,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:23:51,194 INFO L87 Difference]: Start difference. First operand 175563 states and 253225 transitions. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (89), 2 states have call predecessors, (89), 3 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-12-19 14:24:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:24:14,461 INFO L93 Difference]: Finished difference Result 305929 states and 442097 transitions. [2023-12-19 14:24:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:24:14,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (89), 2 states have call predecessors, (89), 3 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 594 [2023-12-19 14:24:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:24:14,935 INFO L225 Difference]: With dead ends: 305929 [2023-12-19 14:24:14,935 INFO L226 Difference]: Without dead ends: 176205 [2023-12-19 14:24:15,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-12-19 14:24:15,024 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 378 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:24:15,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1478 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 14:24:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176205 states. [2023-12-19 14:24:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176205 to 175554. [2023-12-19 14:24:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175554 states, 154841 states have (on average 1.4197789991023049) internal successors, (219840), 155249 states have internal predecessors, (219840), 16529 states have call successors, (16529), 4183 states have call predecessors, (16529), 4183 states have return successors, (16529), 16121 states have call predecessors, (16529), 16529 states have call successors, (16529) [2023-12-19 14:24:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175554 states to 175554 states and 252898 transitions. [2023-12-19 14:24:39,108 INFO L78 Accepts]: Start accepts. Automaton has 175554 states and 252898 transitions. Word has length 594 [2023-12-19 14:24:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:24:39,109 INFO L495 AbstractCegarLoop]: Abstraction has 175554 states and 252898 transitions. [2023-12-19 14:24:39,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (89), 2 states have call predecessors, (89), 3 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-12-19 14:24:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 175554 states and 252898 transitions. [2023-12-19 14:24:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-12-19 14:24:39,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:24:39,130 INFO L195 NwaCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 14:24:39,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-19 14:24:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:39,340 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:24:39,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:24:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 145338021, now seen corresponding path program 1 times [2023-12-19 14:24:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:24:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507491105] [2023-12-19 14:24:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:24:39,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:24:39,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151057448] [2023-12-19 14:24:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:24:39,386 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:24:39,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-19 14:24:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:24:40,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 14:24:40,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:24:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 9158 proven. 294 refuted. 0 times theorem prover too weak. 6212 trivial. 0 not checked. [2023-12-19 14:24:41,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:24:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 480 proven. 303 refuted. 0 times theorem prover too weak. 14881 trivial. 0 not checked. [2023-12-19 14:24:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:24:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507491105] [2023-12-19 14:24:42,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:24:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151057448] [2023-12-19 14:24:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151057448] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:24:42,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:24:42,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-12-19 14:24:42,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59511243] [2023-12-19 14:24:42,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:24:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 14:24:42,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:24:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 14:24:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2023-12-19 14:24:42,084 INFO L87 Difference]: Start difference. First operand 175554 states and 252898 transitions. Second operand has 32 states, 32 states have (on average 8.53125) internal successors, (273), 32 states have internal predecessors, (273), 7 states have call successors, (128), 4 states have call predecessors, (128), 10 states have return successors, (129), 7 states have call predecessors, (129), 7 states have call successors, (129) [2023-12-19 14:25:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:25:34,129 INFO L93 Difference]: Finished difference Result 688682 states and 996651 transitions. [2023-12-19 14:25:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-19 14:25:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.53125) internal successors, (273), 32 states have internal predecessors, (273), 7 states have call successors, (128), 4 states have call predecessors, (128), 10 states have return successors, (129), 7 states have call predecessors, (129), 7 states have call successors, (129) Word has length 594 [2023-12-19 14:25:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:25:35,421 INFO L225 Difference]: With dead ends: 688682 [2023-12-19 14:25:35,421 INFO L226 Difference]: Without dead ends: 526970 [2023-12-19 14:25:35,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1159 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1086, Invalid=3074, Unknown=0, NotChecked=0, Total=4160 [2023-12-19 14:25:35,610 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 6401 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 2643 mSolverCounterSat, 1556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6450 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 4199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1556 IncrementalHoareTripleChecker+Valid, 2643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-19 14:25:35,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6450 Valid, 2907 Invalid, 4199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1556 Valid, 2643 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-19 14:25:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526970 states.