/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-81.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 14:21:43,595 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 14:21:43,648 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 14:21:43,652 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 14:21:43,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 14:21:43,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 14:21:43,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 14:21:43,674 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 14:21:43,675 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 14:21:43,678 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 14:21:43,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 14:21:43,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 14:21:43,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 14:21:43,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 14:21:43,680 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 14:21:43,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 14:21:43,680 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 14:21:43,680 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 14:21:43,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 14:21:43,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 14:21:43,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 14:21:43,682 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 14:21:43,682 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 14:21:43,682 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 14:21:43,682 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 14:21:43,683 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 14:21:43,683 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 14:21:43,683 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 14:21:43,683 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 14:21:43,684 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 14:21:43,684 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 14:21:43,684 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 14:21:43,685 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 14:21:43,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 14:21:43,686 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 14:21:43,686 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 14:21:43,686 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 14:21:43,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 14:21:43,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 14:21:43,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 14:21:43,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 14:21:43,885 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 14:21:43,885 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 14:21:43,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-81.i [2023-12-19 14:21:44,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 14:21:45,013 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 14:21:45,014 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-81.i [2023-12-19 14:21:45,024 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18fa462f/dffd45ae326743fba95dafe9b6c23cb2/FLAG3749e2ffe [2023-12-19 14:21:45,038 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18fa462f/dffd45ae326743fba95dafe9b6c23cb2 [2023-12-19 14:21:45,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 14:21:45,041 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 14:21:45,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 14:21:45,041 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 14:21:45,050 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 14:21:45,051 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45, skipping insertion in model container [2023-12-19 14:21:45,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,116 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 14:21:45,247 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-81.i[916,929] [2023-12-19 14:21:45,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 14:21:45,488 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 14:21:45,503 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-81.i[916,929] [2023-12-19 14:21:45,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 14:21:45,607 INFO L206 MainTranslator]: Completed translation [2023-12-19 14:21:45,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45 WrapperNode [2023-12-19 14:21:45,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 14:21:45,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 14:21:45,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 14:21:45,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 14:21:45,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,763 INFO L138 Inliner]: procedures = 26, calls = 89, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 850 [2023-12-19 14:21:45,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 14:21:45,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 14:21:45,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 14:21:45,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 14:21:45,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,802 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,884 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 14:21:45,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 14:21:45,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 14:21:45,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 14:21:45,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 14:21:45,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (1/1) ... [2023-12-19 14:21:45,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 14:21:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:46,025 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 14:21:46,096 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 14:21:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 14:21:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 14:21:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 14:21:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 14:21:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 14:21:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 14:21:46,214 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 14:21:46,216 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 14:21:46,994 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 14:21:47,036 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 14:21:47,036 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 14:21:47,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:21:47 BoogieIcfgContainer [2023-12-19 14:21:47,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 14:21:47,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 14:21:47,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 14:21:47,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 14:21:47,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 02:21:45" (1/3) ... [2023-12-19 14:21:47,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6942df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:21:47, skipping insertion in model container [2023-12-19 14:21:47,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:21:45" (2/3) ... [2023-12-19 14:21:47,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6942df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:21:47, skipping insertion in model container [2023-12-19 14:21:47,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:21:47" (3/3) ... [2023-12-19 14:21:47,042 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-81.i [2023-12-19 14:21:47,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 14:21:47,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 14:21:47,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 14:21:47,104 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;@6ff7ea77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 14:21:47,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 14:21:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 309 states, 230 states have (on average 1.6) internal successors, (368), 231 states have internal predecessors, (368), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-12-19 14:21:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-19 14:21:47,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:47,140 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:47,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1654664883, now seen corresponding path program 1 times [2023-12-19 14:21:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:47,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378443896] [2023-12-19 14:21:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378443896] [2023-12-19 14:21:47,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 14:21:47,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278225407] [2023-12-19 14:21:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:47,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:47,491 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 14:21:47,498 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 14:21:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:47,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 14:21:47,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2023-12-19 14:21:47,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:47,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278225407] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:47,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:47,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 14:21:47,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329407802] [2023-12-19 14:21:47,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 14:21:47,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 14:21:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 14:21:47,954 INFO L87 Difference]: Start difference. First operand has 309 states, 230 states have (on average 1.6) internal successors, (368), 231 states have internal predecessors, (368), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-12-19 14:21:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:48,021 INFO L93 Difference]: Finished difference Result 613 states and 1110 transitions. [2023-12-19 14:21:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 14:21:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) Word has length 524 [2023-12-19 14:21:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:48,040 INFO L225 Difference]: With dead ends: 613 [2023-12-19 14:21:48,040 INFO L226 Difference]: Without dead ends: 305 [2023-12-19 14:21:48,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 523 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 14:21:48,047 INFO L413 NwaCegarLoop]: 506 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, 506 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 14:21:48,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 506 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:21:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-12-19 14:21:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-12-19 14:21:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 227 states have (on average 1.5726872246696035) internal successors, (357), 227 states have internal predecessors, (357), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-12-19 14:21:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 509 transitions. [2023-12-19 14:21:48,121 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 509 transitions. Word has length 524 [2023-12-19 14:21:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:48,122 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 509 transitions. [2023-12-19 14:21:48,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-12-19 14:21:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 509 transitions. [2023-12-19 14:21:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-19 14:21:48,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:48,131 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:48,150 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 14:21:48,339 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 14:21:48,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:48,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash 310370151, now seen corresponding path program 1 times [2023-12-19 14:21:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:48,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214233064] [2023-12-19 14:21:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:48,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:48,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814024756] [2023-12-19 14:21:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:48,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:48,483 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 14:21:48,515 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 14:21:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:48,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 14:21:48,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:49,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:49,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:49,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214233064] [2023-12-19 14:21:49,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:49,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814024756] [2023-12-19 14:21:49,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814024756] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:49,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:49,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:49,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708100525] [2023-12-19 14:21:49,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:49,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:21:49,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:21:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:21:49,298 INFO L87 Difference]: Start difference. First operand 305 states and 509 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:49,589 INFO L93 Difference]: Finished difference Result 974 states and 1623 transitions. [2023-12-19 14:21:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:21:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 524 [2023-12-19 14:21:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:49,595 INFO L225 Difference]: With dead ends: 974 [2023-12-19 14:21:49,595 INFO L226 Difference]: Without dead ends: 670 [2023-12-19 14:21:49,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 521 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 14:21:49,596 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 655 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:49,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1576 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:21:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-12-19 14:21:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 624. [2023-12-19 14:21:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 469 states have (on average 1.5756929637526653) internal successors, (739), 469 states have internal predecessors, (739), 152 states have call successors, (152), 2 states have call predecessors, (152), 2 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-12-19 14:21:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1043 transitions. [2023-12-19 14:21:49,647 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1043 transitions. Word has length 524 [2023-12-19 14:21:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:49,648 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 1043 transitions. [2023-12-19 14:21:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1043 transitions. [2023-12-19 14:21:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-12-19 14:21:49,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:49,654 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:49,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 14:21:49,864 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 14:21:49,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:49,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 95307237, now seen corresponding path program 1 times [2023-12-19 14:21:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:49,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465096636] [2023-12-19 14:21:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:49,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596127945] [2023-12-19 14:21:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:49,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:49,930 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 14:21:49,959 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 14:21:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:50,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 14:21:50,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:50,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465096636] [2023-12-19 14:21:50,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596127945] [2023-12-19 14:21:50,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596127945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:50,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:50,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:50,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669940315] [2023-12-19 14:21:50,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:50,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:21:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:21:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:21:50,684 INFO L87 Difference]: Start difference. First operand 624 states and 1043 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:50,945 INFO L93 Difference]: Finished difference Result 2023 states and 3378 transitions. [2023-12-19 14:21:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:21:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 525 [2023-12-19 14:21:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:50,953 INFO L225 Difference]: With dead ends: 2023 [2023-12-19 14:21:50,953 INFO L226 Difference]: Without dead ends: 1400 [2023-12-19 14:21:50,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 522 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 14:21:50,956 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 648 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:50,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1579 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:21:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2023-12-19 14:21:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1314. [2023-12-19 14:21:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1005 states have (on average 1.5820895522388059) internal successors, (1590), 1005 states have internal predecessors, (1590), 304 states have call successors, (304), 4 states have call predecessors, (304), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2023-12-19 14:21:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2198 transitions. [2023-12-19 14:21:51,038 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2198 transitions. Word has length 525 [2023-12-19 14:21:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:51,040 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 2198 transitions. [2023-12-19 14:21:51,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2198 transitions. [2023-12-19 14:21:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-12-19 14:21:51,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:51,049 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:51,059 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 14:21:51,260 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 14:21:51,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:51,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2029145790, now seen corresponding path program 1 times [2023-12-19 14:21:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:51,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377568339] [2023-12-19 14:21:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:51,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:51,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503197537] [2023-12-19 14:21:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:51,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:51,323 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 14:21:51,348 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 14:21:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:51,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 14:21:51,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:51,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377568339] [2023-12-19 14:21:51,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503197537] [2023-12-19 14:21:51,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503197537] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:51,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:51,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51899042] [2023-12-19 14:21:51,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 14:21:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 14:21:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:21:51,733 INFO L87 Difference]: Start difference. First operand 1314 states and 2198 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:51,787 INFO L93 Difference]: Finished difference Result 3432 states and 5772 transitions. [2023-12-19 14:21:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 14:21:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 526 [2023-12-19 14:21:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:51,795 INFO L225 Difference]: With dead ends: 3432 [2023-12-19 14:21:51,795 INFO L226 Difference]: Without dead ends: 2119 [2023-12-19 14:21:51,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 524 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 14:21:51,799 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 286 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:51,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1001 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:21:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2023-12-19 14:21:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1410. [2023-12-19 14:21:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1101 states have (on average 1.5930971843778383) internal successors, (1754), 1101 states have internal predecessors, (1754), 304 states have call successors, (304), 4 states have call predecessors, (304), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2023-12-19 14:21:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2362 transitions. [2023-12-19 14:21:51,873 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2362 transitions. Word has length 526 [2023-12-19 14:21:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:51,874 INFO L495 AbstractCegarLoop]: Abstraction has 1410 states and 2362 transitions. [2023-12-19 14:21:51,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2362 transitions. [2023-12-19 14:21:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-12-19 14:21:51,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:51,881 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:51,901 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 14:21:52,088 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 14:21:52,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:52,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash 386690560, now seen corresponding path program 1 times [2023-12-19 14:21:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:52,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639851012] [2023-12-19 14:21:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:52,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:52,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:52,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643833479] [2023-12-19 14:21:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:52,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:52,135 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 14:21:52,152 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 14:21:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:52,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 14:21:52,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:52,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:52,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:52,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639851012] [2023-12-19 14:21:52,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:52,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643833479] [2023-12-19 14:21:52,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643833479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:52,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:52,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515479635] [2023-12-19 14:21:52,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:52,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 14:21:52,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 14:21:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:21:52,486 INFO L87 Difference]: Start difference. First operand 1410 states and 2362 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:52,592 INFO L93 Difference]: Finished difference Result 3848 states and 6436 transitions. [2023-12-19 14:21:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 14:21:52,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 526 [2023-12-19 14:21:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:52,601 INFO L225 Difference]: With dead ends: 3848 [2023-12-19 14:21:52,601 INFO L226 Difference]: Without dead ends: 2439 [2023-12-19 14:21:52,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 524 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 14:21:52,606 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 382 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:52,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1247 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:21:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2023-12-19 14:21:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2433. [2023-12-19 14:21:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1888 states have (on average 1.583686440677966) internal successors, (2990), 1892 states have internal predecessors, (2990), 536 states have call successors, (536), 8 states have call predecessors, (536), 8 states have return successors, (536), 532 states have call predecessors, (536), 536 states have call successors, (536) [2023-12-19 14:21:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 4062 transitions. [2023-12-19 14:21:52,769 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 4062 transitions. Word has length 526 [2023-12-19 14:21:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:52,769 INFO L495 AbstractCegarLoop]: Abstraction has 2433 states and 4062 transitions. [2023-12-19 14:21:52,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 4062 transitions. [2023-12-19 14:21:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-12-19 14:21:52,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:52,774 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:52,781 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 14:21:52,981 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 14:21:52,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:52,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -580660094, now seen corresponding path program 1 times [2023-12-19 14:21:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:52,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376643635] [2023-12-19 14:21:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:52,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:53,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434798400] [2023-12-19 14:21:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:53,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:53,041 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 14:21:53,079 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 14:21:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:53,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 14:21:53,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:53,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:53,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376643635] [2023-12-19 14:21:53,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434798400] [2023-12-19 14:21:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434798400] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:53,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925878989] [2023-12-19 14:21:53,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 14:21:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 14:21:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:21:53,404 INFO L87 Difference]: Start difference. First operand 2433 states and 4062 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:53,500 INFO L93 Difference]: Finished difference Result 4887 states and 8140 transitions. [2023-12-19 14:21:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 14:21:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 526 [2023-12-19 14:21:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:53,509 INFO L225 Difference]: With dead ends: 4887 [2023-12-19 14:21:53,509 INFO L226 Difference]: Without dead ends: 2455 [2023-12-19 14:21:53,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 524 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 14:21:53,515 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 343 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:53,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1091 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:21:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2023-12-19 14:21:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1678. [2023-12-19 14:21:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1365 states have (on average 1.6043956043956045) internal successors, (2190), 1365 states have internal predecessors, (2190), 304 states have call successors, (304), 8 states have call predecessors, (304), 8 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2023-12-19 14:21:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2798 transitions. [2023-12-19 14:21:53,595 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2798 transitions. Word has length 526 [2023-12-19 14:21:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:53,596 INFO L495 AbstractCegarLoop]: Abstraction has 1678 states and 2798 transitions. [2023-12-19 14:21:53,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2798 transitions. [2023-12-19 14:21:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-12-19 14:21:53,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:53,599 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:53,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 14:21:53,807 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 14:21:53,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:53,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash -280659480, now seen corresponding path program 1 times [2023-12-19 14:21:53,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:53,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854049586] [2023-12-19 14:21:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:53,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228332127] [2023-12-19 14:21:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:53,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:53,874 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 14:21:53,899 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 14:21:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:54,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 14:21:54,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:54,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854049586] [2023-12-19 14:21:54,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228332127] [2023-12-19 14:21:54,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228332127] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:54,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:54,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616878176] [2023-12-19 14:21:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 14:21:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 14:21:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:21:54,263 INFO L87 Difference]: Start difference. First operand 1678 states and 2798 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:54,387 INFO L93 Difference]: Finished difference Result 5010 states and 8356 transitions. [2023-12-19 14:21:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 14:21:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 527 [2023-12-19 14:21:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:54,400 INFO L225 Difference]: With dead ends: 5010 [2023-12-19 14:21:54,400 INFO L226 Difference]: Without dead ends: 3333 [2023-12-19 14:21:54,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 525 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 14:21:54,405 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 497 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:54,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 990 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:21:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2023-12-19 14:21:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3331. [2023-12-19 14:21:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2706 states have (on average 1.598669623059867) internal successors, (4326), 2706 states have internal predecessors, (4326), 608 states have call successors, (608), 16 states have call predecessors, (608), 16 states have return successors, (608), 608 states have call predecessors, (608), 608 states have call successors, (608) [2023-12-19 14:21:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 5542 transitions. [2023-12-19 14:21:54,590 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 5542 transitions. Word has length 527 [2023-12-19 14:21:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:54,591 INFO L495 AbstractCegarLoop]: Abstraction has 3331 states and 5542 transitions. [2023-12-19 14:21:54,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 5542 transitions. [2023-12-19 14:21:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-12-19 14:21:54,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:54,595 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:54,624 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 14:21:54,802 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 14:21:54,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:54,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1770324518, now seen corresponding path program 1 times [2023-12-19 14:21:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:54,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254351870] [2023-12-19 14:21:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:54,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:54,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170323420] [2023-12-19 14:21:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:54,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:54,860 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 14:21:54,890 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 14:21:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:55,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 14:21:55,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:21:55,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:21:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254351870] [2023-12-19 14:21:55,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170323420] [2023-12-19 14:21:55,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170323420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:21:55,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:21:55,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:21:55,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011821396] [2023-12-19 14:21:55,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:21:55,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 14:21:55,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 14:21:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 14:21:55,233 INFO L87 Difference]: Start difference. First operand 3331 states and 5542 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:55,307 INFO L93 Difference]: Finished difference Result 6661 states and 11083 transitions. [2023-12-19 14:21:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 14:21:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 527 [2023-12-19 14:21:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:55,318 INFO L225 Difference]: With dead ends: 6661 [2023-12-19 14:21:55,318 INFO L226 Difference]: Without dead ends: 3331 [2023-12-19 14:21:55,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 525 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 14:21:55,324 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 185 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:55,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 821 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:21:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2023-12-19 14:21:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 3331. [2023-12-19 14:21:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2706 states have (on average 1.5957132298595713) internal successors, (4318), 2706 states have internal predecessors, (4318), 608 states have call successors, (608), 16 states have call predecessors, (608), 16 states have return successors, (608), 608 states have call predecessors, (608), 608 states have call successors, (608) [2023-12-19 14:21:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 5534 transitions. [2023-12-19 14:21:55,495 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 5534 transitions. Word has length 527 [2023-12-19 14:21:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:55,495 INFO L495 AbstractCegarLoop]: Abstraction has 3331 states and 5534 transitions. [2023-12-19 14:21:55,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:21:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 5534 transitions. [2023-12-19 14:21:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-12-19 14:21:55,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:55,499 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:55,508 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 14:21:55,706 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 14:21:55,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:55,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash 445468324, now seen corresponding path program 1 times [2023-12-19 14:21:55,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:55,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814631546] [2023-12-19 14:21:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:55,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:55,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:55,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948122963] [2023-12-19 14:21:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:55,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:55,758 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 14:21:55,785 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 14:21:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:56,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:21:56,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 2913 proven. 192 refuted. 0 times theorem prover too weak. 8295 trivial. 0 not checked. [2023-12-19 14:21:56,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:21:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 33 proven. 192 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:21:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:56,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814631546] [2023-12-19 14:21:56,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948122963] [2023-12-19 14:21:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948122963] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:21:56,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:21:56,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:21:56,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858110241] [2023-12-19 14:21:56,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:21:56,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:21:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:21:56,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:21:56,862 INFO L87 Difference]: Start difference. First operand 3331 states and 5534 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2023-12-19 14:21:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:57,290 INFO L93 Difference]: Finished difference Result 6725 states and 11123 transitions. [2023-12-19 14:21:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 14:21:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) Word has length 527 [2023-12-19 14:21:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:57,310 INFO L225 Difference]: With dead ends: 6725 [2023-12-19 14:21:57,311 INFO L226 Difference]: Without dead ends: 3395 [2023-12-19 14:21:57,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1046 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 14:21:57,320 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 528 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:57,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1077 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 14:21:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2023-12-19 14:21:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3363. [2023-12-19 14:21:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 2730 states have (on average 1.5816849816849816) internal successors, (4318), 2730 states have internal predecessors, (4318), 608 states have call successors, (608), 24 states have call predecessors, (608), 24 states have return successors, (608), 608 states have call predecessors, (608), 608 states have call successors, (608) [2023-12-19 14:21:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 5534 transitions. [2023-12-19 14:21:57,545 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 5534 transitions. Word has length 527 [2023-12-19 14:21:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:57,546 INFO L495 AbstractCegarLoop]: Abstraction has 3363 states and 5534 transitions. [2023-12-19 14:21:57,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2023-12-19 14:21:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 5534 transitions. [2023-12-19 14:21:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-12-19 14:21:57,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:57,550 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:57,560 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 14:21:57,758 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 14:21:57,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:57,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash -24706050, now seen corresponding path program 1 times [2023-12-19 14:21:57,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414637409] [2023-12-19 14:21:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:57,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:57,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616492192] [2023-12-19 14:21:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:57,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:57,812 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 14:21:57,836 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 14:21:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:21:58,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:21:58,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:21:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3325 proven. 186 refuted. 0 times theorem prover too weak. 7889 trivial. 0 not checked. [2023-12-19 14:21:58,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:21:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 39 proven. 186 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:21:58,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:21:58,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414637409] [2023-12-19 14:21:58,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:21:58,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616492192] [2023-12-19 14:21:58,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616492192] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:21:58,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:21:58,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 14:21:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617918138] [2023-12-19 14:21:58,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:21:58,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:21:58,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:21:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:21:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:21:58,914 INFO L87 Difference]: Start difference. First operand 3363 states and 5534 transitions. Second operand has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 3 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) [2023-12-19 14:21:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:21:59,366 INFO L93 Difference]: Finished difference Result 6789 states and 11123 transitions. [2023-12-19 14:21:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 14:21:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 3 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) Word has length 528 [2023-12-19 14:21:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:21:59,419 INFO L225 Difference]: With dead ends: 6789 [2023-12-19 14:21:59,425 INFO L226 Difference]: Without dead ends: 3427 [2023-12-19 14:21:59,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1048 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 14:21:59,430 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 542 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:21:59,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1036 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 14:21:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2023-12-19 14:21:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3395. [2023-12-19 14:21:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 2754 states have (on average 1.5591866376180101) internal successors, (4294), 2754 states have internal predecessors, (4294), 608 states have call successors, (608), 32 states have call predecessors, (608), 32 states have return successors, (608), 608 states have call predecessors, (608), 608 states have call successors, (608) [2023-12-19 14:21:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5510 transitions. [2023-12-19 14:21:59,624 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5510 transitions. Word has length 528 [2023-12-19 14:21:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:21:59,624 INFO L495 AbstractCegarLoop]: Abstraction has 3395 states and 5510 transitions. [2023-12-19 14:21:59,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 3 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) [2023-12-19 14:21:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5510 transitions. [2023-12-19 14:21:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-12-19 14:21:59,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:21:59,629 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:59,639 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 14:21:59,837 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 14:21:59,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:21:59,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:21:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1634334239, now seen corresponding path program 1 times [2023-12-19 14:21:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:21:59,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981416023] [2023-12-19 14:21:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:21:59,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:21:59,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864733920] [2023-12-19 14:21:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:21:59,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:21:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:21:59,885 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 14:21:59,900 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 14:22:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:00,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 14:22:00,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:22:00,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:22:00,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981416023] [2023-12-19 14:22:00,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864733920] [2023-12-19 14:22:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864733920] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:22:00,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:22:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:22:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551839374] [2023-12-19 14:22:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:22:00,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:22:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:22:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:22:00,636 INFO L87 Difference]: Start difference. First operand 3395 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:01,090 INFO L93 Difference]: Finished difference Result 10781 states and 17493 transitions. [2023-12-19 14:22:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:22:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 529 [2023-12-19 14:22:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:01,118 INFO L225 Difference]: With dead ends: 10781 [2023-12-19 14:22:01,118 INFO L226 Difference]: Without dead ends: 7387 [2023-12-19 14:22:01,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 526 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 14:22:01,126 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 642 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:01,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1608 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:22:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2023-12-19 14:22:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 6055. [2023-12-19 14:22:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 4774 states have (on average 1.5362379555927943) internal successors, (7334), 4774 states have internal predecessors, (7334), 1216 states have call successors, (1216), 64 states have call predecessors, (1216), 64 states have return successors, (1216), 1216 states have call predecessors, (1216), 1216 states have call successors, (1216) [2023-12-19 14:22:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 9766 transitions. [2023-12-19 14:22:01,478 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 9766 transitions. Word has length 529 [2023-12-19 14:22:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:01,479 INFO L495 AbstractCegarLoop]: Abstraction has 6055 states and 9766 transitions. [2023-12-19 14:22:01,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:01,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 9766 transitions. [2023-12-19 14:22:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-19 14:22:01,483 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:01,483 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:01,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-19 14:22:01,690 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 14:22:01,691 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:01,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1821905980, now seen corresponding path program 1 times [2023-12-19 14:22:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424724730] [2023-12-19 14:22:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:01,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528970523] [2023-12-19 14:22:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:01,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:01,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:01,746 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 14:22:01,771 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 14:22:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:02,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 14:22:02,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:22:03,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:22:03,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:03,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424724730] [2023-12-19 14:22:03,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:03,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528970523] [2023-12-19 14:22:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528970523] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:22:03,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:22:03,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:22:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897221192] [2023-12-19 14:22:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:22:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:22:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:22:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:22:03,084 INFO L87 Difference]: Start difference. First operand 6055 states and 9766 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:03,513 INFO L93 Difference]: Finished difference Result 12613 states and 20285 transitions. [2023-12-19 14:22:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:22:03,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 530 [2023-12-19 14:22:03,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:03,527 INFO L225 Difference]: With dead ends: 12613 [2023-12-19 14:22:03,527 INFO L226 Difference]: Without dead ends: 6559 [2023-12-19 14:22:03,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 527 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 14:22:03,538 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 623 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:03,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1547 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:22:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2023-12-19 14:22:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 6075. [2023-12-19 14:22:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6075 states, 4794 states have (on average 1.5319148936170213) internal successors, (7344), 4794 states have internal predecessors, (7344), 1216 states have call successors, (1216), 64 states have call predecessors, (1216), 64 states have return successors, (1216), 1216 states have call predecessors, (1216), 1216 states have call successors, (1216) [2023-12-19 14:22:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 9776 transitions. [2023-12-19 14:22:03,847 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 9776 transitions. Word has length 530 [2023-12-19 14:22:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:03,848 INFO L495 AbstractCegarLoop]: Abstraction has 6075 states and 9776 transitions. [2023-12-19 14:22:03,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 9776 transitions. [2023-12-19 14:22:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-19 14:22:03,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:03,852 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:03,874 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 14:22:04,059 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 14:22:04,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:04,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash -871990210, now seen corresponding path program 1 times [2023-12-19 14:22:04,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:04,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167355300] [2023-12-19 14:22:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:04,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:04,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904509401] [2023-12-19 14:22:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:04,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:04,097 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 14:22:04,108 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 14:22:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:04,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:22:04,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 6720 proven. 84 refuted. 0 times theorem prover too weak. 4596 trivial. 0 not checked. [2023-12-19 14:22:04,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 141 proven. 84 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:22:05,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:05,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167355300] [2023-12-19 14:22:05,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:05,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904509401] [2023-12-19 14:22:05,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904509401] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:22:05,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:22:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-19 14:22:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303475234] [2023-12-19 14:22:05,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:05,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 14:22:05,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 14:22:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-12-19 14:22:05,211 INFO L87 Difference]: Start difference. First operand 6075 states and 9776 transitions. Second operand has 11 states, 11 states have (on average 19.545454545454547) internal successors, (215), 11 states have internal predecessors, (215), 4 states have call successors, (113), 3 states have call predecessors, (113), 5 states have return successors, (113), 4 states have call predecessors, (113), 4 states have call successors, (113) [2023-12-19 14:22:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:05,992 INFO L93 Difference]: Finished difference Result 9607 states and 15401 transitions. [2023-12-19 14:22:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 14:22:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.545454545454547) internal successors, (215), 11 states have internal predecessors, (215), 4 states have call successors, (113), 3 states have call predecessors, (113), 5 states have return successors, (113), 4 states have call predecessors, (113), 4 states have call successors, (113) Word has length 530 [2023-12-19 14:22:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:06,009 INFO L225 Difference]: With dead ends: 9607 [2023-12-19 14:22:06,009 INFO L226 Difference]: Without dead ends: 6203 [2023-12-19 14:22:06,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 1048 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-12-19 14:22:06,017 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1231 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:06,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 1407 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 14:22:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6203 states. [2023-12-19 14:22:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6203 to 6139. [2023-12-19 14:22:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 4842 states have (on average 1.5249896736885584) internal successors, (7384), 4842 states have internal predecessors, (7384), 1216 states have call successors, (1216), 80 states have call predecessors, (1216), 80 states have return successors, (1216), 1216 states have call predecessors, (1216), 1216 states have call successors, (1216) [2023-12-19 14:22:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 9816 transitions. [2023-12-19 14:22:06,331 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 9816 transitions. Word has length 530 [2023-12-19 14:22:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:06,332 INFO L495 AbstractCegarLoop]: Abstraction has 6139 states and 9816 transitions. [2023-12-19 14:22:06,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.545454545454547) internal successors, (215), 11 states have internal predecessors, (215), 4 states have call successors, (113), 3 states have call predecessors, (113), 5 states have return successors, (113), 4 states have call predecessors, (113), 4 states have call successors, (113) [2023-12-19 14:22:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 9816 transitions. [2023-12-19 14:22:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-19 14:22:06,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:06,338 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:06,360 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 14:22:06,560 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 14:22:06,561 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:06,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1839340864, now seen corresponding path program 1 times [2023-12-19 14:22:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735771776] [2023-12-19 14:22:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:06,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:06,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848875719] [2023-12-19 14:22:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:06,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:06,661 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 14:22:06,662 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 14:22:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:07,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 14:22:07,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:22:07,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:22:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735771776] [2023-12-19 14:22:07,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848875719] [2023-12-19 14:22:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848875719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:22:07,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:22:07,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 14:22:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928420112] [2023-12-19 14:22:07,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:22:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 14:22:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 14:22:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-12-19 14:22:07,503 INFO L87 Difference]: Start difference. First operand 6139 states and 9816 transitions. Second operand has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:11,792 INFO L93 Difference]: Finished difference Result 24183 states and 38447 transitions. [2023-12-19 14:22:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 14:22:11,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 530 [2023-12-19 14:22:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:11,850 INFO L225 Difference]: With dead ends: 24183 [2023-12-19 14:22:11,850 INFO L226 Difference]: Without dead ends: 20747 [2023-12-19 14:22:11,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2023-12-19 14:22:11,865 INFO L413 NwaCegarLoop]: 924 mSDtfsCounter, 3201 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3201 SdHoareTripleChecker+Valid, 4537 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:11,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3201 Valid, 4537 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 2818 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-19 14:22:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2023-12-19 14:22:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 15289. [2023-12-19 14:22:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15289 states, 12122 states have (on average 1.519386239894407) internal successors, (18418), 12147 states have internal predecessors, (18418), 2922 states have call successors, (2922), 244 states have call predecessors, (2922), 244 states have return successors, (2922), 2897 states have call predecessors, (2922), 2922 states have call successors, (2922) [2023-12-19 14:22:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15289 states to 15289 states and 24262 transitions. [2023-12-19 14:22:13,107 INFO L78 Accepts]: Start accepts. Automaton has 15289 states and 24262 transitions. Word has length 530 [2023-12-19 14:22:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:13,108 INFO L495 AbstractCegarLoop]: Abstraction has 15289 states and 24262 transitions. [2023-12-19 14:22:13,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 15289 states and 24262 transitions. [2023-12-19 14:22:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-19 14:22:13,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:13,114 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:13,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-19 14:22:13,321 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 14:22:13,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:13,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1497395397, now seen corresponding path program 1 times [2023-12-19 14:22:13,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:13,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105624996] [2023-12-19 14:22:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:13,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:13,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:13,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702436062] [2023-12-19 14:22:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:13,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:13,362 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 14:22:13,399 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 14:22:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:13,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:22:13,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:22:14,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:22:14,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105624996] [2023-12-19 14:22:14,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702436062] [2023-12-19 14:22:14,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702436062] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:22:14,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:22:14,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 14:22:14,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420926523] [2023-12-19 14:22:14,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:22:14,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 14:22:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 14:22:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:22:14,205 INFO L87 Difference]: Start difference. First operand 15289 states and 24262 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:15,874 INFO L93 Difference]: Finished difference Result 36521 states and 58017 transitions. [2023-12-19 14:22:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 14:22:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 530 [2023-12-19 14:22:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:15,920 INFO L225 Difference]: With dead ends: 36521 [2023-12-19 14:22:15,920 INFO L226 Difference]: Without dead ends: 21341 [2023-12-19 14:22:15,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-19 14:22:15,939 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 928 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:15,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 2118 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 14:22:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21341 states. [2023-12-19 14:22:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21341 to 20509. [2023-12-19 14:22:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20509 states, 16190 states have (on average 1.5171093267449043) internal successors, (24562), 16223 states have internal predecessors, (24562), 3994 states have call successors, (3994), 324 states have call predecessors, (3994), 324 states have return successors, (3994), 3961 states have call predecessors, (3994), 3994 states have call successors, (3994) [2023-12-19 14:22:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20509 states to 20509 states and 32550 transitions. [2023-12-19 14:22:17,286 INFO L78 Accepts]: Start accepts. Automaton has 20509 states and 32550 transitions. Word has length 530 [2023-12-19 14:22:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:17,288 INFO L495 AbstractCegarLoop]: Abstraction has 20509 states and 32550 transitions. [2023-12-19 14:22:17,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 20509 states and 32550 transitions. [2023-12-19 14:22:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:17,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:17,299 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:17,307 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 14:22:17,506 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 14:22:17,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:17,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2054490374, now seen corresponding path program 1 times [2023-12-19 14:22:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961036482] [2023-12-19 14:22:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:17,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:17,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158390246] [2023-12-19 14:22:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:17,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:17,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:17,547 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 14:22:17,585 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 14:22:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:17,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:22:17,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5593 proven. 132 refuted. 0 times theorem prover too weak. 5675 trivial. 0 not checked. [2023-12-19 14:22:18,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 93 proven. 132 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:22:18,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961036482] [2023-12-19 14:22:18,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158390246] [2023-12-19 14:22:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158390246] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:22:18,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:22:18,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-12-19 14:22:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482281012] [2023-12-19 14:22:18,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 14:22:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 14:22:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-19 14:22:18,550 INFO L87 Difference]: Start difference. First operand 20509 states and 32550 transitions. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-12-19 14:22:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:21,781 INFO L93 Difference]: Finished difference Result 56493 states and 89113 transitions. [2023-12-19 14:22:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-19 14:22:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 531 [2023-12-19 14:22:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:21,867 INFO L225 Difference]: With dead ends: 56493 [2023-12-19 14:22:21,868 INFO L226 Difference]: Without dead ends: 36093 [2023-12-19 14:22:21,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1053 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2023-12-19 14:22:21,891 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 1246 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:21,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 2712 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 14:22:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36093 states. [2023-12-19 14:22:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36093 to 34935. [2023-12-19 14:22:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34935 states, 27575 states have (on average 1.5059655485040797) internal successors, (41527), 27640 states have internal predecessors, (41527), 6714 states have call successors, (6714), 645 states have call predecessors, (6714), 645 states have return successors, (6714), 6649 states have call predecessors, (6714), 6714 states have call successors, (6714) [2023-12-19 14:22:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34935 states to 34935 states and 54955 transitions. [2023-12-19 14:22:24,451 INFO L78 Accepts]: Start accepts. Automaton has 34935 states and 54955 transitions. Word has length 531 [2023-12-19 14:22:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:24,452 INFO L495 AbstractCegarLoop]: Abstraction has 34935 states and 54955 transitions. [2023-12-19 14:22:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-12-19 14:22:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34935 states and 54955 transitions. [2023-12-19 14:22:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:24,459 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:24,459 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:24,469 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 14:22:24,667 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 14:22:24,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:24,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash -115328328, now seen corresponding path program 1 times [2023-12-19 14:22:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:24,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783708012] [2023-12-19 14:22:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:24,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:24,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811127776] [2023-12-19 14:22:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:24,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:24,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:24,706 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 14:22:24,736 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 14:22:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:25,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:22:25,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3613 proven. 42 refuted. 0 times theorem prover too weak. 7745 trivial. 0 not checked. [2023-12-19 14:22:25,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 183 proven. 42 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:22:25,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783708012] [2023-12-19 14:22:25,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811127776] [2023-12-19 14:22:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811127776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:22:25,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:22:25,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:22:25,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069240219] [2023-12-19 14:22:25,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:25,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:22:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:22:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:22:25,452 INFO L87 Difference]: Start difference. First operand 34935 states and 54955 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-12-19 14:22:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:27,833 INFO L93 Difference]: Finished difference Result 70207 states and 109890 transitions. [2023-12-19 14:22:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:22:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 531 [2023-12-19 14:22:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:27,905 INFO L225 Difference]: With dead ends: 70207 [2023-12-19 14:22:27,905 INFO L226 Difference]: Without dead ends: 35385 [2023-12-19 14:22:27,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1054 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 14:22:27,949 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 373 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:27,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1062 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:22:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35385 states. [2023-12-19 14:22:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35385 to 34871. [2023-12-19 14:22:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34871 states, 27463 states have (on average 1.491133525106507) internal successors, (40951), 27528 states have internal predecessors, (40951), 6714 states have call successors, (6714), 693 states have call predecessors, (6714), 693 states have return successors, (6714), 6649 states have call predecessors, (6714), 6714 states have call successors, (6714) [2023-12-19 14:22:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34871 states to 34871 states and 54379 transitions. [2023-12-19 14:22:30,611 INFO L78 Accepts]: Start accepts. Automaton has 34871 states and 54379 transitions. Word has length 531 [2023-12-19 14:22:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:30,612 INFO L495 AbstractCegarLoop]: Abstraction has 34871 states and 54379 transitions. [2023-12-19 14:22:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-12-19 14:22:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 34871 states and 54379 transitions. [2023-12-19 14:22:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:30,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:30,619 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:30,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-19 14:22:30,826 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 14:22:30,826 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:30,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1173166406, now seen corresponding path program 1 times [2023-12-19 14:22:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:30,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995647032] [2023-12-19 14:22:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:30,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:30,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:30,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872907649] [2023-12-19 14:22:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:30,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:30,882 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 14:22:30,886 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 14:22:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:31,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:22:31,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3225 proven. 36 refuted. 0 times theorem prover too weak. 8139 trivial. 0 not checked. [2023-12-19 14:22:31,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 189 proven. 36 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:22:31,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:31,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995647032] [2023-12-19 14:22:31,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:31,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872907649] [2023-12-19 14:22:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872907649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:22:31,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:22:31,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:22:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324488040] [2023-12-19 14:22:31,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:22:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:22:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:22:31,651 INFO L87 Difference]: Start difference. First operand 34871 states and 54379 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-12-19 14:22:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:34,185 INFO L93 Difference]: Finished difference Result 70431 states and 109346 transitions. [2023-12-19 14:22:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:22:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 531 [2023-12-19 14:22:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:34,260 INFO L225 Difference]: With dead ends: 70431 [2023-12-19 14:22:34,260 INFO L226 Difference]: Without dead ends: 35673 [2023-12-19 14:22:34,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1054 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 14:22:34,310 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 972 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:34,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1070 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:22:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2023-12-19 14:22:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 35063. [2023-12-19 14:22:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 27607 states have (on average 1.4856739232803275) internal successors, (41015), 27672 states have internal predecessors, (41015), 6714 states have call successors, (6714), 741 states have call predecessors, (6714), 741 states have return successors, (6714), 6649 states have call predecessors, (6714), 6714 states have call successors, (6714) [2023-12-19 14:22:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 54443 transitions. [2023-12-19 14:22:37,132 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 54443 transitions. Word has length 531 [2023-12-19 14:22:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:37,133 INFO L495 AbstractCegarLoop]: Abstraction has 35063 states and 54443 transitions. [2023-12-19 14:22:37,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-12-19 14:22:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 54443 transitions. [2023-12-19 14:22:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:37,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:37,140 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:37,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 14:22:37,344 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 14:22:37,344 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:37,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1146100804, now seen corresponding path program 1 times [2023-12-19 14:22:37,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525714644] [2023-12-19 14:22:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:37,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:37,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982611852] [2023-12-19 14:22:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:37,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:37,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:37,430 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 14:22:37,448 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 14:22:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:37,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 14:22:37,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:22:37,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:22:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525714644] [2023-12-19 14:22:37,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982611852] [2023-12-19 14:22:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982611852] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:22:37,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:22:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 14:22:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368220057] [2023-12-19 14:22:37,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:22:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 14:22:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 14:22:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:22:37,975 INFO L87 Difference]: Start difference. First operand 35063 states and 54443 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:42,181 INFO L93 Difference]: Finished difference Result 103495 states and 161029 transitions. [2023-12-19 14:22:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 14:22:42,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 531 [2023-12-19 14:22:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:42,343 INFO L225 Difference]: With dead ends: 103495 [2023-12-19 14:22:42,344 INFO L226 Difference]: Without dead ends: 68545 [2023-12-19 14:22:42,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-19 14:22:42,391 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 860 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:42,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1552 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:22:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68545 states. [2023-12-19 14:22:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68545 to 47015. [2023-12-19 14:22:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47015 states, 39511 states have (on average 1.5365594391435295) internal successors, (60711), 39576 states have internal predecessors, (60711), 6714 states have call successors, (6714), 789 states have call predecessors, (6714), 789 states have return successors, (6714), 6649 states have call predecessors, (6714), 6714 states have call successors, (6714) [2023-12-19 14:22:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47015 states to 47015 states and 74139 transitions. [2023-12-19 14:22:46,080 INFO L78 Accepts]: Start accepts. Automaton has 47015 states and 74139 transitions. Word has length 531 [2023-12-19 14:22:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:46,081 INFO L495 AbstractCegarLoop]: Abstraction has 47015 states and 74139 transitions. [2023-12-19 14:22:46,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:22:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 47015 states and 74139 transitions. [2023-12-19 14:22:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:46,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:46,089 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:46,098 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 14:22:46,295 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 14:22:46,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:46,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1303499326, now seen corresponding path program 1 times [2023-12-19 14:22:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:46,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012178414] [2023-12-19 14:22:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:46,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:46,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910163279] [2023-12-19 14:22:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:46,332 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 14:22:46,348 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 14:22:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:46,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:22:46,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3969 proven. 48 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2023-12-19 14:22:46,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 177 proven. 48 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:22:47,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:47,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012178414] [2023-12-19 14:22:47,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:47,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910163279] [2023-12-19 14:22:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910163279] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:22:47,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:22:47,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:22:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870739364] [2023-12-19 14:22:47,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:47,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:22:47,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:22:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:22:47,102 INFO L87 Difference]: Start difference. First operand 47015 states and 74139 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 14:22:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:48,589 INFO L93 Difference]: Finished difference Result 47435 states and 74558 transitions. [2023-12-19 14:22:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:22:48,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 531 [2023-12-19 14:22:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:48,627 INFO L225 Difference]: With dead ends: 47435 [2023-12-19 14:22:48,627 INFO L226 Difference]: Without dead ends: 21673 [2023-12-19 14:22:48,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1054 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 14:22:48,654 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 358 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:48,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 1030 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 14:22:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21673 states. [2023-12-19 14:22:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21673 to 21255. [2023-12-19 14:22:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21255 states, 17431 states have (on average 1.5158625437439046) internal successors, (26423), 17448 states have internal predecessors, (26423), 3418 states have call successors, (3418), 405 states have call predecessors, (3418), 405 states have return successors, (3418), 3401 states have call predecessors, (3418), 3418 states have call successors, (3418) [2023-12-19 14:22:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21255 states to 21255 states and 33259 transitions. [2023-12-19 14:22:50,182 INFO L78 Accepts]: Start accepts. Automaton has 21255 states and 33259 transitions. Word has length 531 [2023-12-19 14:22:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:50,183 INFO L495 AbstractCegarLoop]: Abstraction has 21255 states and 33259 transitions. [2023-12-19 14:22:50,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 14:22:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21255 states and 33259 transitions. [2023-12-19 14:22:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:50,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:50,188 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:50,196 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 14:22:50,395 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 14:22:50,396 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:50,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1230227245, now seen corresponding path program 1 times [2023-12-19 14:22:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:50,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778272829] [2023-12-19 14:22:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:50,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:50,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:50,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958884964] [2023-12-19 14:22:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:50,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:50,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:50,504 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 14:22:50,524 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 14:22:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:50,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 14:22:50,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 4293 proven. 54 refuted. 0 times theorem prover too weak. 7053 trivial. 0 not checked. [2023-12-19 14:22:51,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:22:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:22:51,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:51,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778272829] [2023-12-19 14:22:51,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:51,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958884964] [2023-12-19 14:22:51,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958884964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:22:51,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:22:51,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 14:22:51,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584360042] [2023-12-19 14:22:51,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:22:51,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 14:22:51,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 14:22:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 14:22:51,385 INFO L87 Difference]: Start difference. First operand 21255 states and 33259 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-12-19 14:22:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:22:52,379 INFO L93 Difference]: Finished difference Result 32059 states and 49945 transitions. [2023-12-19 14:22:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:22:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 531 [2023-12-19 14:22:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:22:52,397 INFO L225 Difference]: With dead ends: 32059 [2023-12-19 14:22:52,397 INFO L226 Difference]: Without dead ends: 10917 [2023-12-19 14:22:52,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1054 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 14:22:52,413 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 549 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:22:52,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1030 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 14:22:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2023-12-19 14:22:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 10625. [2023-12-19 14:22:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10625 states, 8658 states have (on average 1.5028875028875028) internal successors, (13012), 8666 states have internal predecessors, (13012), 1740 states have call successors, (1740), 226 states have call predecessors, (1740), 226 states have return successors, (1740), 1732 states have call predecessors, (1740), 1740 states have call successors, (1740) [2023-12-19 14:22:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10625 states to 10625 states and 16492 transitions. [2023-12-19 14:22:53,048 INFO L78 Accepts]: Start accepts. Automaton has 10625 states and 16492 transitions. Word has length 531 [2023-12-19 14:22:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:22:53,049 INFO L495 AbstractCegarLoop]: Abstraction has 10625 states and 16492 transitions. [2023-12-19 14:22:53,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-12-19 14:22:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10625 states and 16492 transitions. [2023-12-19 14:22:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:22:53,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:22:53,053 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:53,060 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 14:22:53,260 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 14:22:53,261 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:22:53,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:22:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1634202341, now seen corresponding path program 1 times [2023-12-19 14:22:53,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:22:53,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419060637] [2023-12-19 14:22:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:22:53,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:22:53,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604088719] [2023-12-19 14:22:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:22:53,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:22:53,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:22:53,332 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 14:22:53,357 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 14:22:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:22:53,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-19 14:22:53,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:22:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:22:55,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:22:55,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:22:55,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419060637] [2023-12-19 14:22:55,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:22:55,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604088719] [2023-12-19 14:22:55,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604088719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:22:55,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:22:55,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-19 14:22:55,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856890274] [2023-12-19 14:22:55,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:22:55,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 14:22:55,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:22:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 14:22:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-19 14:22:55,650 INFO L87 Difference]: Start difference. First operand 10625 states and 16492 transitions. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 14 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:01,672 INFO L93 Difference]: Finished difference Result 37472 states and 58615 transitions. [2023-12-19 14:23:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 14:23:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 14 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 531 [2023-12-19 14:23:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:01,720 INFO L225 Difference]: With dead ends: 37472 [2023-12-19 14:23:01,720 INFO L226 Difference]: Without dead ends: 27466 [2023-12-19 14:23:01,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 14:23:01,737 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 7082 mSDsluCounter, 5376 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7082 SdHoareTripleChecker+Valid, 6088 SdHoareTripleChecker+Invalid, 5420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:01,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7082 Valid, 6088 Invalid, 5420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 4260 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-19 14:23:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27466 states. [2023-12-19 14:23:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27466 to 16442. [2023-12-19 14:23:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16442 states, 13771 states have (on average 1.5135429525815118) internal successors, (20843), 13795 states have internal predecessors, (20843), 2364 states have call successors, (2364), 306 states have call predecessors, (2364), 306 states have return successors, (2364), 2340 states have call predecessors, (2364), 2364 states have call successors, (2364) [2023-12-19 14:23:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16442 states to 16442 states and 25571 transitions. [2023-12-19 14:23:02,999 INFO L78 Accepts]: Start accepts. Automaton has 16442 states and 25571 transitions. Word has length 531 [2023-12-19 14:23:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:03,000 INFO L495 AbstractCegarLoop]: Abstraction has 16442 states and 25571 transitions. [2023-12-19 14:23:03,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 14 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 16442 states and 25571 transitions. [2023-12-19 14:23:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:23:03,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:03,005 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:03,016 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 14:23:03,214 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 14:23:03,214 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:03,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash -415185501, now seen corresponding path program 1 times [2023-12-19 14:23:03,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:03,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236408772] [2023-12-19 14:23:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:03,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89596225] [2023-12-19 14:23:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:03,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:03,262 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 14:23:03,287 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 14:23:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:03,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 14:23:03,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:23:04,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:23:04,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236408772] [2023-12-19 14:23:04,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89596225] [2023-12-19 14:23:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89596225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:23:04,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:23:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 14:23:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315359338] [2023-12-19 14:23:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:23:04,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 14:23:04,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 14:23:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-19 14:23:04,441 INFO L87 Difference]: Start difference. First operand 16442 states and 25571 transitions. Second operand has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:08,431 INFO L93 Difference]: Finished difference Result 46574 states and 71724 transitions. [2023-12-19 14:23:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 14:23:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 531 [2023-12-19 14:23:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:08,476 INFO L225 Difference]: With dead ends: 46574 [2023-12-19 14:23:08,476 INFO L226 Difference]: Without dead ends: 28701 [2023-12-19 14:23:08,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2023-12-19 14:23:08,493 INFO L413 NwaCegarLoop]: 1216 mSDtfsCounter, 3309 mSDsluCounter, 5303 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3309 SdHoareTripleChecker+Valid, 6519 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:08,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3309 Valid, 6519 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 14:23:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28701 states. [2023-12-19 14:23:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28701 to 15959. [2023-12-19 14:23:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15959 states, 13288 states have (on average 1.502031908488862) internal successors, (19959), 13312 states have internal predecessors, (19959), 2364 states have call successors, (2364), 306 states have call predecessors, (2364), 306 states have return successors, (2364), 2340 states have call predecessors, (2364), 2364 states have call successors, (2364) [2023-12-19 14:23:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15959 states to 15959 states and 24687 transitions. [2023-12-19 14:23:09,958 INFO L78 Accepts]: Start accepts. Automaton has 15959 states and 24687 transitions. Word has length 531 [2023-12-19 14:23:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:09,958 INFO L495 AbstractCegarLoop]: Abstraction has 15959 states and 24687 transitions. [2023-12-19 14:23:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15959 states and 24687 transitions. [2023-12-19 14:23:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-19 14:23:09,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:09,963 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:09,974 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 14:23:10,171 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 14:23:10,172 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:10,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1605702051, now seen corresponding path program 1 times [2023-12-19 14:23:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182929110] [2023-12-19 14:23:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:10,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14810319] [2023-12-19 14:23:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:10,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:10,264 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 14:23:10,265 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 14:23:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:10,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 14:23:10,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:23:11,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:23:11,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182929110] [2023-12-19 14:23:11,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14810319] [2023-12-19 14:23:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14810319] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:23:11,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:23:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 14:23:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399028161] [2023-12-19 14:23:11,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:23:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 14:23:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 14:23:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-12-19 14:23:11,933 INFO L87 Difference]: Start difference. First operand 15959 states and 24687 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 9 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:15,692 INFO L93 Difference]: Finished difference Result 41673 states and 64678 transitions. [2023-12-19 14:23:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 14:23:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 9 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 531 [2023-12-19 14:23:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:15,732 INFO L225 Difference]: With dead ends: 41673 [2023-12-19 14:23:15,732 INFO L226 Difference]: Without dead ends: 26598 [2023-12-19 14:23:15,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2023-12-19 14:23:15,749 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 3459 mSDsluCounter, 2738 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:15,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3470 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-19 14:23:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26598 states. [2023-12-19 14:23:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26598 to 16611. [2023-12-19 14:23:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16611 states, 13940 states have (on average 1.5073170731707317) internal successors, (21012), 13964 states have internal predecessors, (21012), 2364 states have call successors, (2364), 306 states have call predecessors, (2364), 306 states have return successors, (2364), 2340 states have call predecessors, (2364), 2364 states have call successors, (2364) [2023-12-19 14:23:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16611 states to 16611 states and 25740 transitions. [2023-12-19 14:23:17,069 INFO L78 Accepts]: Start accepts. Automaton has 16611 states and 25740 transitions. Word has length 531 [2023-12-19 14:23:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:17,069 INFO L495 AbstractCegarLoop]: Abstraction has 16611 states and 25740 transitions. [2023-12-19 14:23:17,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 9 states have internal predecessors, (154), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 16611 states and 25740 transitions. [2023-12-19 14:23:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-12-19 14:23:17,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:17,075 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:17,086 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 14:23:17,283 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 14:23:17,283 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:17,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2120504106, now seen corresponding path program 1 times [2023-12-19 14:23:17,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:17,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142309100] [2023-12-19 14:23:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:17,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:17,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:17,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879676509] [2023-12-19 14:23:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:17,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:17,325 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 14:23:17,346 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 14:23:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:17,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 14:23:17,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:23:18,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:23:18,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142309100] [2023-12-19 14:23:18,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879676509] [2023-12-19 14:23:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879676509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:23:18,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:23:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 14:23:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38681196] [2023-12-19 14:23:18,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:23:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 14:23:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 14:23:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 14:23:18,237 INFO L87 Difference]: Start difference. First operand 16611 states and 25740 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:20,958 INFO L93 Difference]: Finished difference Result 57508 states and 89532 transitions. [2023-12-19 14:23:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 14:23:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 532 [2023-12-19 14:23:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:21,030 INFO L225 Difference]: With dead ends: 57508 [2023-12-19 14:23:21,031 INFO L226 Difference]: Without dead ends: 41077 [2023-12-19 14:23:21,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-12-19 14:23:21,052 INFO L413 NwaCegarLoop]: 1297 mSDtfsCounter, 2141 mSDsluCounter, 2462 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 3759 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:21,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2141 Valid, 3759 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:23:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41077 states. [2023-12-19 14:23:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41077 to 34779. [2023-12-19 14:23:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34779 states, 29212 states have (on average 1.5068807339449541) internal successors, (44019), 29264 states have internal predecessors, (44019), 4944 states have call successors, (4944), 622 states have call predecessors, (4944), 622 states have return successors, (4944), 4892 states have call predecessors, (4944), 4944 states have call successors, (4944) [2023-12-19 14:23:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34779 states to 34779 states and 53907 transitions. [2023-12-19 14:23:23,791 INFO L78 Accepts]: Start accepts. Automaton has 34779 states and 53907 transitions. Word has length 532 [2023-12-19 14:23:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:23,792 INFO L495 AbstractCegarLoop]: Abstraction has 34779 states and 53907 transitions. [2023-12-19 14:23:23,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 34779 states and 53907 transitions. [2023-12-19 14:23:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-12-19 14:23:23,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:23,807 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:23,817 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 14:23:24,015 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 14:23:24,015 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:24,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 329096024, now seen corresponding path program 1 times [2023-12-19 14:23:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367539510] [2023-12-19 14:23:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:24,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:24,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:24,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382331005] [2023-12-19 14:23:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:24,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:24,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:24,078 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 14:23:24,080 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 14:23:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:24,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 14:23:24,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:23:24,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:23:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367539510] [2023-12-19 14:23:24,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382331005] [2023-12-19 14:23:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382331005] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:23:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:23:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 14:23:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597895850] [2023-12-19 14:23:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:23:24,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 14:23:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 14:23:24,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 14:23:24,939 INFO L87 Difference]: Start difference. First operand 34779 states and 53907 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:30,021 INFO L93 Difference]: Finished difference Result 113003 states and 175517 transitions. [2023-12-19 14:23:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 14:23:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 532 [2023-12-19 14:23:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:30,199 INFO L225 Difference]: With dead ends: 113003 [2023-12-19 14:23:30,199 INFO L226 Difference]: Without dead ends: 80007 [2023-12-19 14:23:30,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-12-19 14:23:30,243 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 1774 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 3755 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:30,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 3755 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 14:23:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80007 states. [2023-12-19 14:23:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80007 to 67615. [2023-12-19 14:23:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67615 states, 56568 states have (on average 1.49962876537972) internal successors, (84831), 56672 states have internal predecessors, (84831), 9812 states have call successors, (9812), 1234 states have call predecessors, (9812), 1234 states have return successors, (9812), 9708 states have call predecessors, (9812), 9812 states have call successors, (9812) [2023-12-19 14:23:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67615 states to 67615 states and 104455 transitions. [2023-12-19 14:23:35,714 INFO L78 Accepts]: Start accepts. Automaton has 67615 states and 104455 transitions. Word has length 532 [2023-12-19 14:23:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:35,715 INFO L495 AbstractCegarLoop]: Abstraction has 67615 states and 104455 transitions. [2023-12-19 14:23:35,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 67615 states and 104455 transitions. [2023-12-19 14:23:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-12-19 14:23:35,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:35,723 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:35,734 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 14:23:35,931 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 14:23:35,932 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:35,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1665048682, now seen corresponding path program 1 times [2023-12-19 14:23:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450367268] [2023-12-19 14:23:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:35,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:35,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770894506] [2023-12-19 14:23:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:35,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:35,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:35,971 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 14:23:35,972 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 14:23:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:36,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 14:23:36,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5733 proven. 102 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-12-19 14:23:36,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:23:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 123 proven. 102 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:23:37,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450367268] [2023-12-19 14:23:37,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770894506] [2023-12-19 14:23:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770894506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:23:37,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:23:37,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 14:23:37,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101552732] [2023-12-19 14:23:37,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:23:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 14:23:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 14:23:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 14:23:37,035 INFO L87 Difference]: Start difference. First operand 67615 states and 104455 transitions. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 2 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 2 states have call predecessors, (111), 2 states have call successors, (111) [2023-12-19 14:23:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:41,316 INFO L93 Difference]: Finished difference Result 93085 states and 143266 transitions. [2023-12-19 14:23:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 14:23:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 2 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 2 states have call predecessors, (111), 2 states have call successors, (111) Word has length 532 [2023-12-19 14:23:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:41,383 INFO L225 Difference]: With dead ends: 93085 [2023-12-19 14:23:41,383 INFO L226 Difference]: Without dead ends: 43541 [2023-12-19 14:23:41,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 1055 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-12-19 14:23:41,425 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 1159 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:41,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 2099 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 14:23:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43541 states. [2023-12-19 14:23:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43541 to 41435. [2023-12-19 14:23:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41435 states, 34435 states have (on average 1.4813416581966024) internal successors, (51010), 34499 states have internal predecessors, (51010), 6156 states have call successors, (6156), 843 states have call predecessors, (6156), 843 states have return successors, (6156), 6092 states have call predecessors, (6156), 6156 states have call successors, (6156) [2023-12-19 14:23:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41435 states to 41435 states and 63322 transitions. [2023-12-19 14:23:44,946 INFO L78 Accepts]: Start accepts. Automaton has 41435 states and 63322 transitions. Word has length 532 [2023-12-19 14:23:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:44,946 INFO L495 AbstractCegarLoop]: Abstraction has 41435 states and 63322 transitions. [2023-12-19 14:23:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 2 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 2 states have call predecessors, (111), 2 states have call successors, (111) [2023-12-19 14:23:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 41435 states and 63322 transitions. [2023-12-19 14:23:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-12-19 14:23:44,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:44,952 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:44,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-19 14:23:45,160 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 14:23:45,160 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:45,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash 521998994, now seen corresponding path program 1 times [2023-12-19 14:23:45,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:45,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569927180] [2023-12-19 14:23:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:45,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:45,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177794555] [2023-12-19 14:23:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:45,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:45,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:45,224 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 14:23:45,230 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 14:23:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:45,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 14:23:45,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:23:46,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:23:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569927180] [2023-12-19 14:23:46,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177794555] [2023-12-19 14:23:46,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177794555] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:23:46,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:23:46,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 14:23:46,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640705323] [2023-12-19 14:23:46,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:23:46,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 14:23:46,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:46,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 14:23:46,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-19 14:23:46,556 INFO L87 Difference]: Start difference. First operand 41435 states and 63322 transitions. Second operand has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 8 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:23:50,666 INFO L93 Difference]: Finished difference Result 50085 states and 76270 transitions. [2023-12-19 14:23:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 14:23:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 8 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 532 [2023-12-19 14:23:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:23:50,744 INFO L225 Difference]: With dead ends: 50085 [2023-12-19 14:23:50,745 INFO L226 Difference]: Without dead ends: 44223 [2023-12-19 14:23:50,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-12-19 14:23:50,765 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 1111 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:23:50,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 3231 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 14:23:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44223 states. [2023-12-19 14:23:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44223 to 43113. [2023-12-19 14:23:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43113 states, 35745 states have (on average 1.4790320324520911) internal successors, (52868), 35817 states have internal predecessors, (52868), 6484 states have call successors, (6484), 883 states have call predecessors, (6484), 883 states have return successors, (6484), 6412 states have call predecessors, (6484), 6484 states have call successors, (6484) [2023-12-19 14:23:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43113 states to 43113 states and 65836 transitions. [2023-12-19 14:23:54,597 INFO L78 Accepts]: Start accepts. Automaton has 43113 states and 65836 transitions. Word has length 532 [2023-12-19 14:23:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:23:54,597 INFO L495 AbstractCegarLoop]: Abstraction has 43113 states and 65836 transitions. [2023-12-19 14:23:54,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 8 states have internal predecessors, (155), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:23:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 43113 states and 65836 transitions. [2023-12-19 14:23:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-12-19 14:23:54,603 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:23:54,603 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:54,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-19 14:23:54,811 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 14:23:54,812 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:23:54,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:23:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1857260767, now seen corresponding path program 1 times [2023-12-19 14:23:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:23:54,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985329267] [2023-12-19 14:23:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:54,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:23:54,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:23:54,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218888171] [2023-12-19 14:23:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:23:54,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:23:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:23:54,852 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 14:23:54,866 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 14:23:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:23:55,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 14:23:55,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:23:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3705 proven. 180 refuted. 0 times theorem prover too weak. 7515 trivial. 0 not checked. [2023-12-19 14:23:55,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:23:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 45 proven. 180 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:23:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:23:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985329267] [2023-12-19 14:23:56,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:23:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218888171] [2023-12-19 14:23:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218888171] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:23:56,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:23:56,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2023-12-19 14:23:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540895764] [2023-12-19 14:23:56,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:23:56,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 14:23:56,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:23:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 14:23:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2023-12-19 14:23:56,316 INFO L87 Difference]: Start difference. First operand 43113 states and 65836 transitions. Second operand has 19 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 3 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 3 states have call predecessors, (137), 3 states have call successors, (137) [2023-12-19 14:24:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:24:03,677 INFO L93 Difference]: Finished difference Result 132045 states and 200299 transitions. [2023-12-19 14:24:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 14:24:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 3 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 3 states have call predecessors, (137), 3 states have call successors, (137) Word has length 533 [2023-12-19 14:24:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:24:03,845 INFO L225 Difference]: With dead ends: 132045 [2023-12-19 14:24:03,845 INFO L226 Difference]: Without dead ends: 89200 [2023-12-19 14:24:03,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=439, Invalid=1043, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 14:24:03,895 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 5592 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5637 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:24:03,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5637 Valid, 2203 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 14:24:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89200 states. [2023-12-19 14:24:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89200 to 58994. [2023-12-19 14:24:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58994 states, 52297 states have (on average 1.5051341377134444) internal successors, (78714), 52369 states have internal predecessors, (78714), 5716 states have call successors, (5716), 980 states have call predecessors, (5716), 980 states have return successors, (5716), 5644 states have call predecessors, (5716), 5716 states have call successors, (5716) [2023-12-19 14:24:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58994 states to 58994 states and 90146 transitions. [2023-12-19 14:24:08,119 INFO L78 Accepts]: Start accepts. Automaton has 58994 states and 90146 transitions. Word has length 533 [2023-12-19 14:24:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:24:08,119 INFO L495 AbstractCegarLoop]: Abstraction has 58994 states and 90146 transitions. [2023-12-19 14:24:08,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 3 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 3 states have call predecessors, (137), 3 states have call successors, (137) [2023-12-19 14:24:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 58994 states and 90146 transitions. [2023-12-19 14:24:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-19 14:24:08,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:24:08,127 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:08,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 14:24:08,335 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 14:24:08,335 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:24:08,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:24:08,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1662181315, now seen corresponding path program 1 times [2023-12-19 14:24:08,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:24:08,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050803425] [2023-12-19 14:24:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:24:08,373 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:24:08,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387698759] [2023-12-19 14:24:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:24:08,375 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 14:24:08,410 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 14:24:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:24:08,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 14:24:08,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:24:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 4653 proven. 162 refuted. 0 times theorem prover too weak. 6585 trivial. 0 not checked. [2023-12-19 14:24:09,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:24:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 63 proven. 162 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:24:09,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:24:09,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050803425] [2023-12-19 14:24:09,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:24:09,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387698759] [2023-12-19 14:24:09,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387698759] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:24:09,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:24:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-19 14:24:09,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880351711] [2023-12-19 14:24:09,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:24:09,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 14:24:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:24:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 14:24:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-19 14:24:09,678 INFO L87 Difference]: Start difference. First operand 58994 states and 90146 transitions. Second operand has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 3 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 3 states have call predecessors, (131), 3 states have call successors, (131) [2023-12-19 14:24:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:24:13,593 INFO L93 Difference]: Finished difference Result 117677 states and 179297 transitions. [2023-12-19 14:24:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 14:24:13,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 3 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 3 states have call predecessors, (131), 3 states have call successors, (131) Word has length 534 [2023-12-19 14:24:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:24:13,685 INFO L225 Difference]: With dead ends: 117677 [2023-12-19 14:24:13,685 INFO L226 Difference]: Without dead ends: 59963 [2023-12-19 14:24:13,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-12-19 14:24:13,729 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 772 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 14:24:13,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1843 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 14:24:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59963 states. [2023-12-19 14:24:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59963 to 59391. [2023-12-19 14:24:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59391 states, 52613 states have (on average 1.502100241385209) internal successors, (79030), 52685 states have internal predecessors, (79030), 5716 states have call successors, (5716), 1061 states have call predecessors, (5716), 1061 states have return successors, (5716), 5644 states have call predecessors, (5716), 5716 states have call successors, (5716) [2023-12-19 14:24:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59391 states to 59391 states and 90462 transitions. [2023-12-19 14:24:17,693 INFO L78 Accepts]: Start accepts. Automaton has 59391 states and 90462 transitions. Word has length 534 [2023-12-19 14:24:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:24:17,693 INFO L495 AbstractCegarLoop]: Abstraction has 59391 states and 90462 transitions. [2023-12-19 14:24:17,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 3 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 3 states have call predecessors, (131), 3 states have call successors, (131) [2023-12-19 14:24:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 59391 states and 90462 transitions. [2023-12-19 14:24:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-19 14:24:17,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:24:17,707 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:17,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-19 14:24:17,915 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 14:24:17,915 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:24:17,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:24:17,915 INFO L85 PathProgramCache]: Analyzing trace with hash 954054815, now seen corresponding path program 1 times [2023-12-19 14:24:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:24:17,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349277891] [2023-12-19 14:24:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:24:17,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:24:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296952262] [2023-12-19 14:24:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:24:17,988 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 14:24:17,998 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 14:24:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:24:18,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 14:24:18,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:24:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:24:18,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:24:18,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:24:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349277891] [2023-12-19 14:24:18,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:24:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296952262] [2023-12-19 14:24:18,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296952262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:24:18,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:24:18,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 14:24:18,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666925360] [2023-12-19 14:24:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:24:18,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 14:24:18,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:24:18,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 14:24:18,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:24:18,556 INFO L87 Difference]: Start difference. First operand 59391 states and 90462 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:24:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:24:22,498 INFO L93 Difference]: Finished difference Result 127239 states and 194569 transitions. [2023-12-19 14:24:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 14:24:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 534 [2023-12-19 14:24:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:24:22,609 INFO L225 Difference]: With dead ends: 127239 [2023-12-19 14:24:22,610 INFO L226 Difference]: Without dead ends: 68523 [2023-12-19 14:24:22,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 14:24:22,658 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 59 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2052 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 14:24:22,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 2052 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 14:24:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68523 states. [2023-12-19 14:24:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68523 to 59955. [2023-12-19 14:24:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59955 states, 53177 states have (on average 1.4999341820711962) internal successors, (79762), 53249 states have internal predecessors, (79762), 5716 states have call successors, (5716), 1061 states have call predecessors, (5716), 1061 states have return successors, (5716), 5644 states have call predecessors, (5716), 5716 states have call successors, (5716) [2023-12-19 14:24:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59955 states to 59955 states and 91194 transitions. [2023-12-19 14:24:26,676 INFO L78 Accepts]: Start accepts. Automaton has 59955 states and 91194 transitions. Word has length 534 [2023-12-19 14:24:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:24:26,676 INFO L495 AbstractCegarLoop]: Abstraction has 59955 states and 91194 transitions. [2023-12-19 14:24:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:24:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59955 states and 91194 transitions. [2023-12-19 14:24:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-19 14:24:26,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:24:26,684 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:26,694 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 14:24:26,892 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 14:24:26,892 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:24:26,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:24:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash 600966433, now seen corresponding path program 1 times [2023-12-19 14:24:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:24:26,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013238977] [2023-12-19 14:24:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:24:26,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:24:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739680598] [2023-12-19 14:24:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:26,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:26,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:24:26,966 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 14:24:26,968 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 14:24:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:24:27,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 14:24:27,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:24:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5733 proven. 102 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-12-19 14:24:28,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:24:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 123 proven. 102 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-12-19 14:24:28,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:24:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013238977] [2023-12-19 14:24:28,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:24:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739680598] [2023-12-19 14:24:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739680598] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:24:28,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:24:28,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-19 14:24:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598892866] [2023-12-19 14:24:28,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:24:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 14:24:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:24:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 14:24:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-19 14:24:28,835 INFO L87 Difference]: Start difference. First operand 59955 states and 91194 transitions. Second operand has 16 states, 16 states have (on average 17.75) internal successors, (284), 16 states have internal predecessors, (284), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) [2023-12-19 14:24:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:24:38,933 INFO L93 Difference]: Finished difference Result 141863 states and 212979 transitions. [2023-12-19 14:24:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-19 14:24:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.75) internal successors, (284), 16 states have internal predecessors, (284), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) Word has length 534 [2023-12-19 14:24:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:24:39,057 INFO L225 Difference]: With dead ends: 141863 [2023-12-19 14:24:39,061 INFO L226 Difference]: Without dead ends: 74745 [2023-12-19 14:24:39,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1062 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1370, Invalid=4636, Unknown=0, NotChecked=0, Total=6006 [2023-12-19 14:24:39,115 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 7414 mSDsluCounter, 5614 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 1944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7499 SdHoareTripleChecker+Valid, 6357 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1944 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-19 14:24:39,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7499 Valid, 6357 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1944 Valid, 3061 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-19 14:24:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74745 states. [2023-12-19 14:24:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74745 to 47091. [2023-12-19 14:24:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47091 states, 41073 states have (on average 1.4738636086967107) internal successors, (60536), 41137 states have internal predecessors, (60536), 5028 states have call successors, (5028), 989 states have call predecessors, (5028), 989 states have return successors, (5028), 4964 states have call predecessors, (5028), 5028 states have call successors, (5028) [2023-12-19 14:24:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47091 states to 47091 states and 70592 transitions. [2023-12-19 14:24:43,321 INFO L78 Accepts]: Start accepts. Automaton has 47091 states and 70592 transitions. Word has length 534 [2023-12-19 14:24:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:24:43,322 INFO L495 AbstractCegarLoop]: Abstraction has 47091 states and 70592 transitions. [2023-12-19 14:24:43,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.75) internal successors, (284), 16 states have internal predecessors, (284), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) [2023-12-19 14:24:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 47091 states and 70592 transitions. [2023-12-19 14:24:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-19 14:24:43,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:24:43,329 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:43,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-19 14:24:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:43,537 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:24:43,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:24:43,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1281400763, now seen corresponding path program 1 times [2023-12-19 14:24:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:24:43,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039151699] [2023-12-19 14:24:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:43,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:24:43,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:24:43,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812243757] [2023-12-19 14:24:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:24:43,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:24:43,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:24:43,581 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:24:43,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-19 14:24:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:24:44,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 14:24:44,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:24:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 6701 proven. 282 refuted. 0 times theorem prover too weak. 4417 trivial. 0 not checked. [2023-12-19 14:24:44,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:24:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 162 proven. 285 refuted. 0 times theorem prover too weak. 10953 trivial. 0 not checked. [2023-12-19 14:24:45,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:24:45,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039151699] [2023-12-19 14:24:45,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:24:45,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812243757] [2023-12-19 14:24:45,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812243757] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:24:45,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:24:45,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2023-12-19 14:24:45,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560282579] [2023-12-19 14:24:45,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:24:45,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 14:24:45,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:24:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 14:24:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-12-19 14:24:45,538 INFO L87 Difference]: Start difference. First operand 47091 states and 70592 transitions. Second operand has 27 states, 27 states have (on average 9.703703703703704) internal successors, (262), 27 states have internal predecessors, (262), 5 states have call successors, (130), 3 states have call predecessors, (130), 7 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) [2023-12-19 14:25:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:25:10,557 INFO L93 Difference]: Finished difference Result 237795 states and 355179 transitions. [2023-12-19 14:25:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-12-19 14:25:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 9.703703703703704) internal successors, (262), 27 states have internal predecessors, (262), 5 states have call successors, (130), 3 states have call predecessors, (130), 7 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) Word has length 534 [2023-12-19 14:25:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:25:11,089 INFO L225 Difference]: With dead ends: 237795 [2023-12-19 14:25:11,089 INFO L226 Difference]: Without dead ends: 192135 [2023-12-19 14:25:11,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1178 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2823, Invalid=11939, Unknown=0, NotChecked=0, Total=14762 [2023-12-19 14:25:11,169 INFO L413 NwaCegarLoop]: 958 mSDtfsCounter, 3187 mSDsluCounter, 10131 mSDsCounter, 0 mSdLazyCounter, 10271 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3231 SdHoareTripleChecker+Valid, 11089 SdHoareTripleChecker+Invalid, 11032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 10271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-19 14:25:11,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3231 Valid, 11089 Invalid, 11032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [761 Valid, 10271 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-19 14:25:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192135 states. [2023-12-19 14:25:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192135 to 128937. [2023-12-19 14:25:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128937 states, 113188 states have (on average 1.4691486730042054) internal successors, (166290), 113460 states have internal predecessors, (166290), 12772 states have call successors, (12772), 2976 states have call predecessors, (12772), 2976 states have return successors, (12772), 12500 states have call predecessors, (12772), 12772 states have call successors, (12772) [2023-12-19 14:25:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128937 states to 128937 states and 191834 transitions. [2023-12-19 14:25:22,431 INFO L78 Accepts]: Start accepts. Automaton has 128937 states and 191834 transitions. Word has length 534 [2023-12-19 14:25:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:25:22,432 INFO L495 AbstractCegarLoop]: Abstraction has 128937 states and 191834 transitions. [2023-12-19 14:25:22,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.703703703703704) internal successors, (262), 27 states have internal predecessors, (262), 5 states have call successors, (130), 3 states have call predecessors, (130), 7 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) [2023-12-19 14:25:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 128937 states and 191834 transitions. [2023-12-19 14:25:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2023-12-19 14:25:22,441 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:25:22,441 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:25:22,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-19 14:25:22,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-19 14:25:22,650 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:25:22,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:25:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash -918108931, now seen corresponding path program 1 times [2023-12-19 14:25:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:25:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550740105] [2023-12-19 14:25:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:25:22,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:25:22,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:25:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894212799] [2023-12-19 14:25:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:25:22,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:25:22,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:25:22,924 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:25:22,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-19 14:25:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:25:23,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 14:25:23,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:25:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-12-19 14:25:24,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 14:25:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:25:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550740105] [2023-12-19 14:25:24,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:25:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894212799] [2023-12-19 14:25:24,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894212799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 14:25:24,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 14:25:24,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 14:25:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889887472] [2023-12-19 14:25:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 14:25:24,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 14:25:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:25:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 14:25:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 14:25:24,083 INFO L87 Difference]: Start difference. First operand 128937 states and 191834 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:25:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:25:34,071 INFO L93 Difference]: Finished difference Result 261708 states and 389289 transitions. [2023-12-19 14:25:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 14:25:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 535 [2023-12-19 14:25:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:25:34,286 INFO L225 Difference]: With dead ends: 261708 [2023-12-19 14:25:34,286 INFO L226 Difference]: Without dead ends: 132978 [2023-12-19 14:25:34,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 532 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 14:25:34,376 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 358 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:25:34,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1401 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 14:25:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132978 states. [2023-12-19 14:25:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132978 to 131096. [2023-12-19 14:25:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131096 states, 115347 states have (on average 1.4671122786028246) internal successors, (169227), 115619 states have internal predecessors, (169227), 12772 states have call successors, (12772), 2976 states have call predecessors, (12772), 2976 states have return successors, (12772), 12500 states have call predecessors, (12772), 12772 states have call successors, (12772) [2023-12-19 14:25:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131096 states to 131096 states and 194771 transitions. [2023-12-19 14:25:45,485 INFO L78 Accepts]: Start accepts. Automaton has 131096 states and 194771 transitions. Word has length 535 [2023-12-19 14:25:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:25:45,485 INFO L495 AbstractCegarLoop]: Abstraction has 131096 states and 194771 transitions. [2023-12-19 14:25:45,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-12-19 14:25:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 131096 states and 194771 transitions. [2023-12-19 14:25:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-12-19 14:25:45,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:25:45,494 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:25:45,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-19 14:25:45,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:25:45,703 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:25:45,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:25:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1587308425, now seen corresponding path program 1 times [2023-12-19 14:25:45,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:25:45,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960809135] [2023-12-19 14:25:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:25:45,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:25:45,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:25:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382917244] [2023-12-19 14:25:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:25:45,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:25:45,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:25:45,965 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:25:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-19 14:25:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:25:46,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-19 14:25:46,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:25:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5807 proven. 210 refuted. 0 times theorem prover too weak. 5383 trivial. 0 not checked. [2023-12-19 14:25:47,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:25:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 234 proven. 213 refuted. 0 times theorem prover too weak. 10953 trivial. 0 not checked. [2023-12-19 14:25:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:25:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960809135] [2023-12-19 14:25:48,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:25:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382917244] [2023-12-19 14:25:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382917244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:25:48,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:25:48,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-12-19 14:25:48,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646973805] [2023-12-19 14:25:48,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:25:48,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 14:25:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:25:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 14:25:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-12-19 14:25:48,180 INFO L87 Difference]: Start difference. First operand 131096 states and 194771 transitions. Second operand has 24 states, 23 states have (on average 12.91304347826087) internal successors, (297), 22 states have internal predecessors, (297), 6 states have call successors, (152), 4 states have call predecessors, (152), 7 states have return successors, (152), 6 states have call predecessors, (152), 6 states have call successors, (152) [2023-12-19 14:26:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 14:26:27,996 INFO L93 Difference]: Finished difference Result 374497 states and 548891 transitions. [2023-12-19 14:26:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-19 14:26:27,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 12.91304347826087) internal successors, (297), 22 states have internal predecessors, (297), 6 states have call successors, (152), 4 states have call predecessors, (152), 7 states have return successors, (152), 6 states have call predecessors, (152), 6 states have call successors, (152) Word has length 536 [2023-12-19 14:26:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 14:26:28,676 INFO L225 Difference]: With dead ends: 374497 [2023-12-19 14:26:28,676 INFO L226 Difference]: Without dead ends: 309223 [2023-12-19 14:26:28,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2294, Invalid=9262, Unknown=0, NotChecked=0, Total=11556 [2023-12-19 14:26:28,893 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 8758 mSDsluCounter, 5969 mSDsCounter, 0 mSdLazyCounter, 4409 mSolverCounterSat, 3593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8801 SdHoareTripleChecker+Valid, 6622 SdHoareTripleChecker+Invalid, 8002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3593 IncrementalHoareTripleChecker+Valid, 4409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-19 14:26:28,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8801 Valid, 6622 Invalid, 8002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3593 Valid, 4409 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-19 14:26:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309223 states. [2023-12-19 14:26:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309223 to 135600. [2023-12-19 14:26:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135600 states, 120024 states have (on average 1.4636489368792909) internal successors, (175673), 120280 states have internal predecessors, (175673), 12508 states have call successors, (12508), 3067 states have call predecessors, (12508), 3067 states have return successors, (12508), 12252 states have call predecessors, (12508), 12508 states have call successors, (12508) [2023-12-19 14:26:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135600 states to 135600 states and 200689 transitions. [2023-12-19 14:26:43,195 INFO L78 Accepts]: Start accepts. Automaton has 135600 states and 200689 transitions. Word has length 536 [2023-12-19 14:26:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 14:26:43,196 INFO L495 AbstractCegarLoop]: Abstraction has 135600 states and 200689 transitions. [2023-12-19 14:26:43,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 12.91304347826087) internal successors, (297), 22 states have internal predecessors, (297), 6 states have call successors, (152), 4 states have call predecessors, (152), 7 states have return successors, (152), 6 states have call predecessors, (152), 6 states have call successors, (152) [2023-12-19 14:26:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 135600 states and 200689 transitions. [2023-12-19 14:26:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-12-19 14:26:43,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 14:26:43,218 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:26:43,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-19 14:26:43,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-19 14:26:43,419 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 14:26:43,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 14:26:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2048127349, now seen corresponding path program 1 times [2023-12-19 14:26:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 14:26:43,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104774816] [2023-12-19 14:26:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:26:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 14:26:43,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 14:26:43,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262216693] [2023-12-19 14:26:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 14:26:43,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 14:26:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 14:26:43,469 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 14:26:43,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-19 14:26:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 14:26:44,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-19 14:26:44,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 14:26:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 7464 proven. 387 refuted. 0 times theorem prover too weak. 3549 trivial. 0 not checked. [2023-12-19 14:26:46,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 14:26:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 477 proven. 405 refuted. 0 times theorem prover too weak. 10518 trivial. 0 not checked. [2023-12-19 14:26:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 14:26:52,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104774816] [2023-12-19 14:26:52,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 14:26:52,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262216693] [2023-12-19 14:26:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262216693] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 14:26:52,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 14:26:52,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 52 [2023-12-19 14:26:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285573710] [2023-12-19 14:26:52,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 14:26:52,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-19 14:26:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 14:26:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-19 14:26:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2023-12-19 14:26:52,480 INFO L87 Difference]: Start difference. First operand 135600 states and 200689 transitions. Second operand has 52 states, 51 states have (on average 6.176470588235294) internal successors, (315), 50 states have internal predecessors, (315), 10 states have call successors, (152), 6 states have call predecessors, (152), 13 states have return successors, (152), 10 states have call predecessors, (152), 10 states have call successors, (152)