/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-72.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:21:53,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:21:53,971 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 21:21:53,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:21:53,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:21:54,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:21:54,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:21:54,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:21:54,004 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:21:54,004 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:21:54,005 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:21:54,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:21:54,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:21:54,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:21:54,006 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:21:54,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:21:54,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:21:54,007 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:21:54,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:21:54,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:21:54,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:21:54,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:21:54,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:21:54,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:21:54,015 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:21:54,015 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:21:54,015 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:21:54,016 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:21:54,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:21:54,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:21:54,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:21:54,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:21:54,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:21:54,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:21:54,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:21:54,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:21:54,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:21:54,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:21:54,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:21:54,018 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:21:54,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:21:54,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:21:54,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:21:54,019 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:21:54,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:21:54,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:21:54,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:21:54,273 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:21:54,273 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:21:54,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-72.i [2023-12-15 21:21:55,457 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:21:55,727 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:21:55,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-72.i [2023-12-15 21:21:55,742 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c50f8e0d8/9a468f5cfe694844b5175eb1f32295d8/FLAG53ef40780 [2023-12-15 21:21:55,755 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c50f8e0d8/9a468f5cfe694844b5175eb1f32295d8 [2023-12-15 21:21:55,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:21:55,758 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:21:55,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:21:55,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:21:55,767 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:21:55,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:21:55" (1/1) ... [2023-12-15 21:21:55,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92e2748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:55, skipping insertion in model container [2023-12-15 21:21:55,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:21:55" (1/1) ... [2023-12-15 21:21:55,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:21:55,969 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-72.i[916,929] [2023-12-15 21:21:56,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:21:56,202 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:21:56,214 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-72.i[916,929] [2023-12-15 21:21:56,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:21:56,341 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:21:56,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56 WrapperNode [2023-12-15 21:21:56,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:21:56,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:21:56,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:21:56,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:21:56,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,462 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 636 [2023-12-15 21:21:56,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:21:56,463 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:21:56,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:21:56,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:21:56,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,484 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,550 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 21:21:56,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,550 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,602 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,621 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:21:56,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:21:56,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:21:56,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:21:56,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (1/1) ... [2023-12-15 21:21:56,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:21:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:21:56,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 21:21:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:21:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 21:21:56,707 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 21:21:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:21:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:21:56,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:21:56,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 21:21:56,838 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:21:56,839 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:21:57,672 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:21:57,731 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:21:57,731 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 21:21:57,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:21:57 BoogieIcfgContainer [2023-12-15 21:21:57,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:21:57,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:21:57,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:21:57,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:21:57,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:21:55" (1/3) ... [2023-12-15 21:21:57,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eac6003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:21:57, skipping insertion in model container [2023-12-15 21:21:57,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:56" (2/3) ... [2023-12-15 21:21:57,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eac6003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:21:57, skipping insertion in model container [2023-12-15 21:21:57,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:21:57" (3/3) ... [2023-12-15 21:21:57,740 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-72.i [2023-12-15 21:21:57,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:21:57,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:21:57,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:21:57,817 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;@480fafe0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:21:57,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:21:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 246 states, 180 states have (on average 1.6055555555555556) internal successors, (289), 181 states have internal predecessors, (289), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-12-15 21:21:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-12-15 21:21:57,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:21:57,859 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:21:57,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:21:57,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:21:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -413512449, now seen corresponding path program 1 times [2023-12-15 21:21:57,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:21:57,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561766028] [2023-12-15 21:21:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:21:57,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:21:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:21:58,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:21:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561766028] [2023-12-15 21:21:58,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 21:21:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827823366] [2023-12-15 21:21:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:21:58,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:21:58,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:21:58,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:21:58,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 21:21:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:21:58,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 21:21:58,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:21:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2023-12-15 21:21:58,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:21:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827823366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:21:58,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:21:58,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 21:21:58,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741178683] [2023-12-15 21:21:58,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:21:58,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 21:21:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:21:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 21:21:58,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:21:58,798 INFO L87 Difference]: Start difference. First operand has 246 states, 180 states have (on average 1.6055555555555556) internal successors, (289), 181 states have internal predecessors, (289), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-12-15 21:21:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:21:58,877 INFO L93 Difference]: Finished difference Result 489 states and 891 transitions. [2023-12-15 21:21:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 21:21:58,881 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 438 [2023-12-15 21:21:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:21:58,895 INFO L225 Difference]: With dead ends: 489 [2023-12-15 21:21:58,895 INFO L226 Difference]: Without dead ends: 244 [2023-12-15 21:21:58,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:21:58,909 INFO L413 NwaCegarLoop]: 407 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, 407 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:21:58,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 407 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:21:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-12-15 21:21:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2023-12-15 21:21:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 179 states have (on average 1.5865921787709498) internal successors, (284), 179 states have internal predecessors, (284), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-12-15 21:21:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 410 transitions. [2023-12-15 21:21:58,991 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 410 transitions. Word has length 438 [2023-12-15 21:21:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:21:58,993 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 410 transitions. [2023-12-15 21:21:58,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-12-15 21:21:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 410 transitions. [2023-12-15 21:21:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-12-15 21:21:59,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:21:59,002 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:21:59,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 21:21:59,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-15 21:21:59,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:21:59,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:21:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1628412977, now seen corresponding path program 1 times [2023-12-15 21:21:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:21:59,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823687219] [2023-12-15 21:21:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:21:59,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:21:59,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:21:59,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996594747] [2023-12-15 21:21:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:21:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:21:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:21:59,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:21:59,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 21:21:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:21:59,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 21:21:59,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:00,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:00,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823687219] [2023-12-15 21:22:00,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996594747] [2023-12-15 21:22:00,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996594747] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:00,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:00,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:22:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258808900] [2023-12-15 21:22:00,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:22:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:22:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:22:00,194 INFO L87 Difference]: Start difference. First operand 244 states and 410 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:00,459 INFO L93 Difference]: Finished difference Result 731 states and 1229 transitions. [2023-12-15 21:22:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:22:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 438 [2023-12-15 21:22:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:00,465 INFO L225 Difference]: With dead ends: 731 [2023-12-15 21:22:00,465 INFO L226 Difference]: Without dead ends: 488 [2023-12-15 21:22:00,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:00,468 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 439 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:00,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1211 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:22:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-12-15 21:22:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 350. [2023-12-15 21:22:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 221 states have (on average 1.4841628959276019) internal successors, (328), 221 states have internal predecessors, (328), 126 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 580 transitions. [2023-12-15 21:22:00,572 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 580 transitions. Word has length 438 [2023-12-15 21:22:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:00,574 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 580 transitions. [2023-12-15 21:22:00,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 580 transitions. [2023-12-15 21:22:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-12-15 21:22:00,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:00,582 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:00,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-15 21:22:00,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:00,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -642861352, now seen corresponding path program 1 times [2023-12-15 21:22:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:00,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791310988] [2023-12-15 21:22:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:00,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:00,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891532602] [2023-12-15 21:22:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:00,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:00,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:00,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 21:22:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:01,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:22:01,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:01,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:01,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791310988] [2023-12-15 21:22:01,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891532602] [2023-12-15 21:22:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891532602] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:01,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:22:01,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943170084] [2023-12-15 21:22:01,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:22:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:22:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:22:01,263 INFO L87 Difference]: Start difference. First operand 350 states and 580 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:01,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:01,344 INFO L93 Difference]: Finished difference Result 833 states and 1392 transitions. [2023-12-15 21:22:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:22:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 439 [2023-12-15 21:22:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:01,353 INFO L225 Difference]: With dead ends: 833 [2023-12-15 21:22:01,353 INFO L226 Difference]: Without dead ends: 590 [2023-12-15 21:22:01,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:22:01,356 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 390 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:01,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 826 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:22:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-12-15 21:22:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 370. [2023-12-15 21:22:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 241 states have (on average 1.4979253112033195) internal successors, (361), 241 states have internal predecessors, (361), 126 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 613 transitions. [2023-12-15 21:22:01,416 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 613 transitions. Word has length 439 [2023-12-15 21:22:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:01,420 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 613 transitions. [2023-12-15 21:22:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 613 transitions. [2023-12-15 21:22:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-12-15 21:22:01,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:01,426 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:01,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:01,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:01,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash -518709420, now seen corresponding path program 1 times [2023-12-15 21:22:01,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:01,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737277727] [2023-12-15 21:22:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:01,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703194595] [2023-12-15 21:22:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:01,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:01,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:01,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 21:22:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:02,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:22:02,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:03,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737277727] [2023-12-15 21:22:03,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703194595] [2023-12-15 21:22:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703194595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:03,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:22:03,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475030238] [2023-12-15 21:22:03,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:03,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:22:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:22:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:03,023 INFO L87 Difference]: Start difference. First operand 370 states and 613 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:03,345 INFO L93 Difference]: Finished difference Result 791 states and 1327 transitions. [2023-12-15 21:22:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:22:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 439 [2023-12-15 21:22:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:03,350 INFO L225 Difference]: With dead ends: 791 [2023-12-15 21:22:03,350 INFO L226 Difference]: Without dead ends: 528 [2023-12-15 21:22:03,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:22:03,352 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 523 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:03,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1199 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:22:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-12-15 21:22:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 384. [2023-12-15 21:22:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 255 states have (on average 1.4941176470588236) internal successors, (381), 255 states have internal predecessors, (381), 126 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 633 transitions. [2023-12-15 21:22:03,388 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 633 transitions. Word has length 439 [2023-12-15 21:22:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:03,389 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 633 transitions. [2023-12-15 21:22:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 633 transitions. [2023-12-15 21:22:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-12-15 21:22:03,395 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:03,396 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:03,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:03,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:03,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1865215318, now seen corresponding path program 1 times [2023-12-15 21:22:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:03,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483759034] [2023-12-15 21:22:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:03,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:03,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611811532] [2023-12-15 21:22:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:03,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:03,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:03,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 21:22:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:04,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:22:04,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:04,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:04,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:04,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483759034] [2023-12-15 21:22:04,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:04,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611811532] [2023-12-15 21:22:04,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611811532] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:04,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:04,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:22:04,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459198867] [2023-12-15 21:22:04,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:04,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:22:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:22:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:22:04,095 INFO L87 Difference]: Start difference. First operand 384 states and 633 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:04,212 INFO L93 Difference]: Finished difference Result 836 states and 1388 transitions. [2023-12-15 21:22:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:22:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 439 [2023-12-15 21:22:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:04,217 INFO L225 Difference]: With dead ends: 836 [2023-12-15 21:22:04,217 INFO L226 Difference]: Without dead ends: 573 [2023-12-15 21:22:04,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:04,219 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 340 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:04,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1182 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:22:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-12-15 21:22:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 570. [2023-12-15 21:22:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 409 states have (on average 1.5403422982885087) internal successors, (630), 410 states have internal predecessors, (630), 156 states have call successors, (156), 4 states have call predecessors, (156), 4 states have return successors, (156), 155 states have call predecessors, (156), 156 states have call successors, (156) [2023-12-15 21:22:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 942 transitions. [2023-12-15 21:22:04,261 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 942 transitions. Word has length 439 [2023-12-15 21:22:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:04,262 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 942 transitions. [2023-12-15 21:22:04,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 942 transitions. [2023-12-15 21:22:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-12-15 21:22:04,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:04,268 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:04,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:04,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:04,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -196017754, now seen corresponding path program 1 times [2023-12-15 21:22:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:04,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862067655] [2023-12-15 21:22:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:04,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:04,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031913719] [2023-12-15 21:22:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:04,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:04,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 21:22:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:04,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:22:04,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:04,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:04,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:04,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862067655] [2023-12-15 21:22:04,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:04,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031913719] [2023-12-15 21:22:04,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031913719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:04,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:04,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:22:04,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373527828] [2023-12-15 21:22:04,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:22:04,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:22:04,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:22:04,901 INFO L87 Difference]: Start difference. First operand 570 states and 942 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:05,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:05,034 INFO L93 Difference]: Finished difference Result 1229 states and 2040 transitions. [2023-12-15 21:22:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:22:05,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 439 [2023-12-15 21:22:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:05,040 INFO L225 Difference]: With dead ends: 1229 [2023-12-15 21:22:05,040 INFO L226 Difference]: Without dead ends: 784 [2023-12-15 21:22:05,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:05,042 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 267 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:05,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1232 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:22:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-12-15 21:22:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 780. [2023-12-15 21:22:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 605 states have (on average 1.571900826446281) internal successors, (951), 608 states have internal predecessors, (951), 168 states have call successors, (168), 6 states have call predecessors, (168), 6 states have return successors, (168), 165 states have call predecessors, (168), 168 states have call successors, (168) [2023-12-15 21:22:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1287 transitions. [2023-12-15 21:22:05,112 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1287 transitions. Word has length 439 [2023-12-15 21:22:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:05,113 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1287 transitions. [2023-12-15 21:22:05,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1287 transitions. [2023-12-15 21:22:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-12-15 21:22:05,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:05,117 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:05,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:05,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:05,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:05,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:05,321 INFO L85 PathProgramCache]: Analyzing trace with hash 858307734, now seen corresponding path program 1 times [2023-12-15 21:22:05,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:05,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625830778] [2023-12-15 21:22:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:05,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:05,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:05,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341402148] [2023-12-15 21:22:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:05,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:05,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:05,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:05,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 21:22:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:05,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:22:05,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:05,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:05,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:05,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625830778] [2023-12-15 21:22:05,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:05,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341402148] [2023-12-15 21:22:05,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341402148] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:05,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:05,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:22:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855312027] [2023-12-15 21:22:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:05,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:22:05,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:22:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:05,738 INFO L87 Difference]: Start difference. First operand 780 states and 1287 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:06,197 INFO L93 Difference]: Finished difference Result 2298 states and 3813 transitions. [2023-12-15 21:22:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:22:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 439 [2023-12-15 21:22:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:06,205 INFO L225 Difference]: With dead ends: 2298 [2023-12-15 21:22:06,205 INFO L226 Difference]: Without dead ends: 1643 [2023-12-15 21:22:06,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:22:06,208 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 1029 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:06,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 1678 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:22:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2023-12-15 21:22:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 850. [2023-12-15 21:22:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 675 states have (on average 1.5911111111111111) internal successors, (1074), 678 states have internal predecessors, (1074), 168 states have call successors, (168), 6 states have call predecessors, (168), 6 states have return successors, (168), 165 states have call predecessors, (168), 168 states have call successors, (168) [2023-12-15 21:22:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1410 transitions. [2023-12-15 21:22:06,262 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1410 transitions. Word has length 439 [2023-12-15 21:22:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:06,262 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1410 transitions. [2023-12-15 21:22:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1410 transitions. [2023-12-15 21:22:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-12-15 21:22:06,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:06,266 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:06,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:06,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:06,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:06,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1696495598, now seen corresponding path program 1 times [2023-12-15 21:22:06,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:06,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664187071] [2023-12-15 21:22:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:06,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:06,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:06,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296742034] [2023-12-15 21:22:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:06,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:06,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:06,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:06,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 21:22:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:06,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:22:06,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3962 proven. 96 refuted. 0 times theorem prover too weak. 3754 trivial. 0 not checked. [2023-12-15 21:22:07,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 90 proven. 96 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:07,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:07,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664187071] [2023-12-15 21:22:07,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:07,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296742034] [2023-12-15 21:22:07,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296742034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:07,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:07,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:22:07,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194389810] [2023-12-15 21:22:07,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:07,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:07,459 INFO L87 Difference]: Start difference. First operand 850 states and 1410 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-12-15 21:22:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:07,889 INFO L93 Difference]: Finished difference Result 1257 states and 2069 transitions. [2023-12-15 21:22:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:22:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) Word has length 439 [2023-12-15 21:22:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:07,893 INFO L225 Difference]: With dead ends: 1257 [2023-12-15 21:22:07,893 INFO L226 Difference]: Without dead ends: 532 [2023-12-15 21:22:07,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 870 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:22:07,896 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 747 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:07,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 847 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:22:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-12-15 21:22:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2023-12-15 21:22:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 382 states have (on average 1.513089005235602) internal successors, (578), 383 states have internal predecessors, (578), 132 states have call successors, (132), 7 states have call predecessors, (132), 7 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-15 21:22:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 842 transitions. [2023-12-15 21:22:07,929 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 842 transitions. Word has length 439 [2023-12-15 21:22:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:07,930 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 842 transitions. [2023-12-15 21:22:07,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-12-15 21:22:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 842 transitions. [2023-12-15 21:22:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-12-15 21:22:07,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:07,934 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:07,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:08,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-15 21:22:08,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:08,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1984349515, now seen corresponding path program 1 times [2023-12-15 21:22:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:08,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004293081] [2023-12-15 21:22:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:08,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:08,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522583605] [2023-12-15 21:22:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:08,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:08,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:08,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:08,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 21:22:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:08,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 21:22:08,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:09,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004293081] [2023-12-15 21:22:09,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522583605] [2023-12-15 21:22:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522583605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:09,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:22:09,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175025376] [2023-12-15 21:22:09,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:09,099 INFO L87 Difference]: Start difference. First operand 522 states and 842 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:09,680 INFO L93 Difference]: Finished difference Result 1457 states and 2382 transitions. [2023-12-15 21:22:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:22:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 440 [2023-12-15 21:22:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:09,686 INFO L225 Difference]: With dead ends: 1457 [2023-12-15 21:22:09,686 INFO L226 Difference]: Without dead ends: 1064 [2023-12-15 21:22:09,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:22:09,688 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 1144 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:09,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 2411 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:22:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-12-15 21:22:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 770. [2023-12-15 21:22:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 624 states have (on average 1.5689102564102564) internal successors, (979), 627 states have internal predecessors, (979), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 133 states have call predecessors, (136), 136 states have call successors, (136) [2023-12-15 21:22:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1251 transitions. [2023-12-15 21:22:09,732 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1251 transitions. Word has length 440 [2023-12-15 21:22:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:09,733 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1251 transitions. [2023-12-15 21:22:09,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1251 transitions. [2023-12-15 21:22:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-12-15 21:22:09,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:09,737 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:09,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:09,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:09,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:09,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1929956617, now seen corresponding path program 1 times [2023-12-15 21:22:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392689554] [2023-12-15 21:22:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:09,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807034703] [2023-12-15 21:22:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:09,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:09,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:10,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 21:22:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:10,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:22:10,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 776 proven. 177 refuted. 0 times theorem prover too weak. 6859 trivial. 0 not checked. [2023-12-15 21:22:10,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 9 proven. 177 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392689554] [2023-12-15 21:22:11,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807034703] [2023-12-15 21:22:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807034703] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:11,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:11,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:22:11,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299774666] [2023-12-15 21:22:11,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:11,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:11,046 INFO L87 Difference]: Start difference. First operand 770 states and 1251 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-12-15 21:22:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:11,413 INFO L93 Difference]: Finished difference Result 1174 states and 1893 transitions. [2023-12-15 21:22:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:22:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) Word has length 440 [2023-12-15 21:22:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:11,417 INFO L225 Difference]: With dead ends: 1174 [2023-12-15 21:22:11,417 INFO L226 Difference]: Without dead ends: 545 [2023-12-15 21:22:11,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 872 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:22:11,419 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 449 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:11,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 860 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:22:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-12-15 21:22:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 517. [2023-12-15 21:22:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 374 states have (on average 1.4893048128342246) internal successors, (557), 375 states have internal predecessors, (557), 132 states have call successors, (132), 10 states have call predecessors, (132), 10 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-15 21:22:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 821 transitions. [2023-12-15 21:22:11,475 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 821 transitions. Word has length 440 [2023-12-15 21:22:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:11,476 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 821 transitions. [2023-12-15 21:22:11,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-12-15 21:22:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 821 transitions. [2023-12-15 21:22:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-12-15 21:22:11,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:11,481 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:11,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 21:22:11,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:11,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -917984049, now seen corresponding path program 1 times [2023-12-15 21:22:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:11,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774109569] [2023-12-15 21:22:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:11,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:11,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022481481] [2023-12-15 21:22:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:11,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:11,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 21:22:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:12,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:22:12,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:12,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774109569] [2023-12-15 21:22:12,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022481481] [2023-12-15 21:22:12,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022481481] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:12,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:12,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:22:12,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358059918] [2023-12-15 21:22:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:12,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:22:12,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:22:12,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:22:12,156 INFO L87 Difference]: Start difference. First operand 517 states and 821 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:12,279 INFO L93 Difference]: Finished difference Result 980 states and 1576 transitions. [2023-12-15 21:22:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:22:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 440 [2023-12-15 21:22:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:12,283 INFO L225 Difference]: With dead ends: 980 [2023-12-15 21:22:12,283 INFO L226 Difference]: Without dead ends: 596 [2023-12-15 21:22:12,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:12,285 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 541 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 995 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:22:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-12-15 21:22:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 464. [2023-12-15 21:22:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 328 states have (on average 1.4847560975609757) internal successors, (487), 328 states have internal predecessors, (487), 126 states have call successors, (126), 9 states have call predecessors, (126), 9 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 739 transitions. [2023-12-15 21:22:12,321 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 739 transitions. Word has length 440 [2023-12-15 21:22:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:12,322 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 739 transitions. [2023-12-15 21:22:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 739 transitions. [2023-12-15 21:22:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-12-15 21:22:12,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:12,325 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:12,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 21:22:12,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:12,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1175228594, now seen corresponding path program 1 times [2023-12-15 21:22:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:12,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935119451] [2023-12-15 21:22:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:12,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175434651] [2023-12-15 21:22:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:12,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:12,587 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:12,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 21:22:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:12,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:22:12,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 1616 proven. 165 refuted. 0 times theorem prover too weak. 6031 trivial. 0 not checked. [2023-12-15 21:22:13,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 21 proven. 165 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935119451] [2023-12-15 21:22:13,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175434651] [2023-12-15 21:22:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175434651] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:13,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:22:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392663380] [2023-12-15 21:22:13,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:13,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:13,666 INFO L87 Difference]: Start difference. First operand 464 states and 739 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-12-15 21:22:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:14,007 INFO L93 Difference]: Finished difference Result 817 states and 1294 transitions. [2023-12-15 21:22:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:22:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) Word has length 440 [2023-12-15 21:22:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:14,010 INFO L225 Difference]: With dead ends: 817 [2023-12-15 21:22:14,010 INFO L226 Difference]: Without dead ends: 429 [2023-12-15 21:22:14,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 872 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:22:14,011 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 358 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:14,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 824 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:22:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-12-15 21:22:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 411. [2023-12-15 21:22:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 273 states have (on average 1.3919413919413919) internal successors, (380), 273 states have internal predecessors, (380), 126 states have call successors, (126), 11 states have call predecessors, (126), 11 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 632 transitions. [2023-12-15 21:22:14,053 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 632 transitions. Word has length 440 [2023-12-15 21:22:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:14,054 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 632 transitions. [2023-12-15 21:22:14,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-12-15 21:22:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 632 transitions. [2023-12-15 21:22:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-12-15 21:22:14,057 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:14,057 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:14,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:14,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-15 21:22:14,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:14,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1487491283, now seen corresponding path program 1 times [2023-12-15 21:22:14,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:14,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141668826] [2023-12-15 21:22:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:14,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881029020] [2023-12-15 21:22:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:14,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:14,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:14,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 21:22:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:14,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-15 21:22:14,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:15,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:15,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:15,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141668826] [2023-12-15 21:22:15,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:15,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881029020] [2023-12-15 21:22:15,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881029020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:15,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:15,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 21:22:15,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111165581] [2023-12-15 21:22:15,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:15,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:15,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:15,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:15,625 INFO L87 Difference]: Start difference. First operand 411 states and 632 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:16,073 INFO L93 Difference]: Finished difference Result 1133 states and 1757 transitions. [2023-12-15 21:22:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:22:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 440 [2023-12-15 21:22:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:16,077 INFO L225 Difference]: With dead ends: 1133 [2023-12-15 21:22:16,077 INFO L226 Difference]: Without dead ends: 857 [2023-12-15 21:22:16,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-12-15 21:22:16,079 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1503 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:16,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1503 Valid, 2217 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:22:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-12-15 21:22:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 420. [2023-12-15 21:22:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 280 states have (on average 1.3785714285714286) internal successors, (386), 280 states have internal predecessors, (386), 126 states have call successors, (126), 13 states have call predecessors, (126), 13 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 638 transitions. [2023-12-15 21:22:16,129 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 638 transitions. Word has length 440 [2023-12-15 21:22:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:16,130 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 638 transitions. [2023-12-15 21:22:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 638 transitions. [2023-12-15 21:22:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-12-15 21:22:16,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:16,133 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:16,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:16,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 21:22:16,342 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:16,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:16,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1346942673, now seen corresponding path program 1 times [2023-12-15 21:22:16,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:16,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249784240] [2023-12-15 21:22:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:16,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:16,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:16,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044558100] [2023-12-15 21:22:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:16,382 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:16,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 21:22:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:16,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-15 21:22:16,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:17,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:17,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:17,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249784240] [2023-12-15 21:22:17,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:17,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044558100] [2023-12-15 21:22:17,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044558100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:17,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:17,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 21:22:17,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098198916] [2023-12-15 21:22:17,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:17,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:17,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:17,715 INFO L87 Difference]: Start difference. First operand 420 states and 638 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:18,309 INFO L93 Difference]: Finished difference Result 1096 states and 1686 transitions. [2023-12-15 21:22:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:22:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 440 [2023-12-15 21:22:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:18,314 INFO L225 Difference]: With dead ends: 1096 [2023-12-15 21:22:18,314 INFO L226 Difference]: Without dead ends: 817 [2023-12-15 21:22:18,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-12-15 21:22:18,316 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 1179 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:18,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 2955 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:22:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-12-15 21:22:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 399. [2023-12-15 21:22:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 259 states have (on average 1.3474903474903475) internal successors, (349), 259 states have internal predecessors, (349), 126 states have call successors, (126), 13 states have call predecessors, (126), 13 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 601 transitions. [2023-12-15 21:22:18,364 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 601 transitions. Word has length 440 [2023-12-15 21:22:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:18,365 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 601 transitions. [2023-12-15 21:22:18,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 601 transitions. [2023-12-15 21:22:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-12-15 21:22:18,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:18,368 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:18,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-15 21:22:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:18,577 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:18,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1215089610, now seen corresponding path program 1 times [2023-12-15 21:22:18,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:18,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177595520] [2023-12-15 21:22:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:18,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:18,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774477500] [2023-12-15 21:22:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:18,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:18,623 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:18,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 21:22:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:18,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:22:18,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:19,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:19,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177595520] [2023-12-15 21:22:19,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774477500] [2023-12-15 21:22:19,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774477500] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:19,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:19,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:22:19,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301251989] [2023-12-15 21:22:19,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:19,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:22:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:22:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:22:19,011 INFO L87 Difference]: Start difference. First operand 399 states and 601 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:19,150 INFO L93 Difference]: Finished difference Result 905 states and 1375 transitions. [2023-12-15 21:22:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:22:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 441 [2023-12-15 21:22:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:19,155 INFO L225 Difference]: With dead ends: 905 [2023-12-15 21:22:19,155 INFO L226 Difference]: Without dead ends: 647 [2023-12-15 21:22:19,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:22:19,156 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 336 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:19,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 823 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:22:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-12-15 21:22:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 482. [2023-12-15 21:22:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 342 states have (on average 1.409356725146199) internal successors, (482), 342 states have internal predecessors, (482), 126 states have call successors, (126), 13 states have call predecessors, (126), 13 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 734 transitions. [2023-12-15 21:22:19,226 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 734 transitions. Word has length 441 [2023-12-15 21:22:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:19,227 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 734 transitions. [2023-12-15 21:22:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 734 transitions. [2023-12-15 21:22:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-12-15 21:22:19,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:19,231 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:19,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-15 21:22:19,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 21:22:19,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:19,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -751214814, now seen corresponding path program 1 times [2023-12-15 21:22:19,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:19,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484226478] [2023-12-15 21:22:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:19,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203582201] [2023-12-15 21:22:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:19,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:19,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:19,505 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:19,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 21:22:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:19,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-15 21:22:19,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 4289 proven. 216 refuted. 0 times theorem prover too weak. 3307 trivial. 0 not checked. [2023-12-15 21:22:20,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 150 proven. 219 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-12-15 21:22:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484226478] [2023-12-15 21:22:21,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203582201] [2023-12-15 21:22:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203582201] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:21,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:21,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-12-15 21:22:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010909352] [2023-12-15 21:22:21,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:21,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-15 21:22:21,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:21,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-15 21:22:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-12-15 21:22:21,422 INFO L87 Difference]: Start difference. First operand 482 states and 734 transitions. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 18 states have internal predecessors, (243), 5 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 5 states have call predecessors, (103), 5 states have call successors, (103) [2023-12-15 21:22:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:22,651 INFO L93 Difference]: Finished difference Result 1106 states and 1644 transitions. [2023-12-15 21:22:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-15 21:22:22,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 18 states have internal predecessors, (243), 5 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 5 states have call predecessors, (103), 5 states have call successors, (103) Word has length 442 [2023-12-15 21:22:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:22,656 INFO L225 Difference]: With dead ends: 1106 [2023-12-15 21:22:22,656 INFO L226 Difference]: Without dead ends: 765 [2023-12-15 21:22:22,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2023-12-15 21:22:22,658 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 787 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:22,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1566 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 21:22:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-12-15 21:22:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 699. [2023-12-15 21:22:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 525 states have (on average 1.417142857142857) internal successors, (744), 526 states have internal predecessors, (744), 148 states have call successors, (148), 25 states have call predecessors, (148), 25 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-12-15 21:22:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1040 transitions. [2023-12-15 21:22:22,731 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1040 transitions. Word has length 442 [2023-12-15 21:22:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:22,732 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 1040 transitions. [2023-12-15 21:22:22,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 18 states have internal predecessors, (243), 5 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 5 states have call predecessors, (103), 5 states have call successors, (103) [2023-12-15 21:22:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1040 transitions. [2023-12-15 21:22:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-15 21:22:22,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:22,735 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:22,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-15 21:22:22,946 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:22,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash 662825629, now seen corresponding path program 1 times [2023-12-15 21:22:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867239256] [2023-12-15 21:22:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:23,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:23,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205782829] [2023-12-15 21:22:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:23,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:23,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:23,006 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:23,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 21:22:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:23,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:22:23,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 308 proven. 183 refuted. 0 times theorem prover too weak. 7321 trivial. 0 not checked. [2023-12-15 21:22:23,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3 proven. 183 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:24,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:24,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867239256] [2023-12-15 21:22:24,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:24,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205782829] [2023-12-15 21:22:24,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205782829] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:24,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:24,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:22:24,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554276368] [2023-12-15 21:22:24,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:24,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:22:24,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:22:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:22:24,277 INFO L87 Difference]: Start difference. First operand 699 states and 1040 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-15 21:22:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:24,710 INFO L93 Difference]: Finished difference Result 1269 states and 1891 transitions. [2023-12-15 21:22:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:22:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 443 [2023-12-15 21:22:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:24,714 INFO L225 Difference]: With dead ends: 1269 [2023-12-15 21:22:24,715 INFO L226 Difference]: Without dead ends: 727 [2023-12-15 21:22:24,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:22:24,717 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 141 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:24,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 769 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:22:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2023-12-15 21:22:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 695. [2023-12-15 21:22:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 521 states have (on average 1.4049904030710172) internal successors, (732), 522 states have internal predecessors, (732), 148 states have call successors, (148), 25 states have call predecessors, (148), 25 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-12-15 21:22:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1028 transitions. [2023-12-15 21:22:24,789 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1028 transitions. Word has length 443 [2023-12-15 21:22:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:24,789 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1028 transitions. [2023-12-15 21:22:24,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-15 21:22:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1028 transitions. [2023-12-15 21:22:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-15 21:22:24,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:24,797 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:24,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-15 21:22:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-15 21:22:25,001 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:25,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1919856482, now seen corresponding path program 1 times [2023-12-15 21:22:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53472179] [2023-12-15 21:22:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:25,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:25,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321541831] [2023-12-15 21:22:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:25,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:25,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:25,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 21:22:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:25,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:22:25,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:25,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:25,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:25,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53472179] [2023-12-15 21:22:25,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:25,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321541831] [2023-12-15 21:22:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321541831] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:25,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:25,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:22:25,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679799661] [2023-12-15 21:22:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:22:25,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:22:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:22:25,449 INFO L87 Difference]: Start difference. First operand 695 states and 1028 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:25,570 INFO L93 Difference]: Finished difference Result 1541 states and 2298 transitions. [2023-12-15 21:22:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:22:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 443 [2023-12-15 21:22:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:25,574 INFO L225 Difference]: With dead ends: 1541 [2023-12-15 21:22:25,574 INFO L226 Difference]: Without dead ends: 1003 [2023-12-15 21:22:25,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:22:25,576 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 310 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:25,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 947 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:22:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2023-12-15 21:22:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 936. [2023-12-15 21:22:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 723 states have (on average 1.4204702627939143) internal successors, (1027), 725 states have internal predecessors, (1027), 178 states have call successors, (178), 34 states have call predecessors, (178), 34 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-15 21:22:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1383 transitions. [2023-12-15 21:22:25,666 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1383 transitions. Word has length 443 [2023-12-15 21:22:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:25,666 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1383 transitions. [2023-12-15 21:22:25,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1383 transitions. [2023-12-15 21:22:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-15 21:22:25,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:25,670 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:25,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:25,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 21:22:25,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:25,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash 41718176, now seen corresponding path program 1 times [2023-12-15 21:22:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:25,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64295138] [2023-12-15 21:22:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:25,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:25,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857318442] [2023-12-15 21:22:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:25,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:25,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:25,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:25,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 21:22:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:26,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 21:22:26,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:27,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64295138] [2023-12-15 21:22:27,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857318442] [2023-12-15 21:22:27,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857318442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:27,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 21:22:27,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54643077] [2023-12-15 21:22:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:27,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 21:22:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 21:22:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:22:28,000 INFO L87 Difference]: Start difference. First operand 936 states and 1383 transitions. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:29,028 INFO L93 Difference]: Finished difference Result 2484 states and 3698 transitions. [2023-12-15 21:22:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:22:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 443 [2023-12-15 21:22:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:29,037 INFO L225 Difference]: With dead ends: 2484 [2023-12-15 21:22:29,037 INFO L226 Difference]: Without dead ends: 1705 [2023-12-15 21:22:29,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:22:29,039 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1147 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:29,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 2203 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 21:22:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2023-12-15 21:22:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1090. [2023-12-15 21:22:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 877 states have (on average 1.451539338654504) internal successors, (1273), 879 states have internal predecessors, (1273), 178 states have call successors, (178), 34 states have call predecessors, (178), 34 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-15 21:22:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1629 transitions. [2023-12-15 21:22:29,134 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1629 transitions. Word has length 443 [2023-12-15 21:22:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:29,135 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1629 transitions. [2023-12-15 21:22:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1629 transitions. [2023-12-15 21:22:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-15 21:22:29,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:29,139 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:29,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:29,348 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:29,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1174435550, now seen corresponding path program 1 times [2023-12-15 21:22:29,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:29,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367762456] [2023-12-15 21:22:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:29,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:29,391 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108580903] [2023-12-15 21:22:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:29,393 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:29,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-15 21:22:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:29,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:22:29,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 5532 proven. 102 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2023-12-15 21:22:30,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 84 proven. 102 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:31,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:31,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367762456] [2023-12-15 21:22:31,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:31,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108580903] [2023-12-15 21:22:31,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108580903] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:31,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:31,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-15 21:22:31,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219512935] [2023-12-15 21:22:31,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:31,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-15 21:22:31,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-15 21:22:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-12-15 21:22:31,137 INFO L87 Difference]: Start difference. First operand 1090 states and 1629 transitions. Second operand has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 7 states have call successors, (104), 4 states have call predecessors, (104), 6 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) [2023-12-15 21:22:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:32,241 INFO L93 Difference]: Finished difference Result 2176 states and 3212 transitions. [2023-12-15 21:22:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 21:22:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 7 states have call successors, (104), 4 states have call predecessors, (104), 6 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) Word has length 443 [2023-12-15 21:22:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:32,247 INFO L225 Difference]: With dead ends: 2176 [2023-12-15 21:22:32,247 INFO L226 Difference]: Without dead ends: 1397 [2023-12-15 21:22:32,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2023-12-15 21:22:32,249 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 1117 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:32,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 1185 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 21:22:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2023-12-15 21:22:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 769. [2023-12-15 21:22:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 619 states have (on average 1.4668820678513732) internal successors, (908), 619 states have internal predecessors, (908), 126 states have call successors, (126), 23 states have call predecessors, (126), 23 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1160 transitions. [2023-12-15 21:22:32,329 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1160 transitions. Word has length 443 [2023-12-15 21:22:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:32,330 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1160 transitions. [2023-12-15 21:22:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 7 states have call successors, (104), 4 states have call predecessors, (104), 6 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) [2023-12-15 21:22:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1160 transitions. [2023-12-15 21:22:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-15 21:22:32,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:32,334 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:32,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:32,544 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1091945636, now seen corresponding path program 1 times [2023-12-15 21:22:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83060354] [2023-12-15 21:22:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:32,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:32,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111506713] [2023-12-15 21:22:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:32,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:32,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:32,597 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:32,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-15 21:22:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:33,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 21:22:33,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:34,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:34,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:34,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83060354] [2023-12-15 21:22:34,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:34,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111506713] [2023-12-15 21:22:34,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111506713] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:34,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:34,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-15 21:22:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29437796] [2023-12-15 21:22:34,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 21:22:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 21:22:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:22:34,256 INFO L87 Difference]: Start difference. First operand 769 states and 1160 transitions. Second operand has 12 states, 12 states have (on average 10.916666666666666) internal successors, (131), 11 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:36,117 INFO L93 Difference]: Finished difference Result 1856 states and 2788 transitions. [2023-12-15 21:22:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 21:22:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.916666666666666) internal successors, (131), 11 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 443 [2023-12-15 21:22:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:36,123 INFO L225 Difference]: With dead ends: 1856 [2023-12-15 21:22:36,123 INFO L226 Difference]: Without dead ends: 1272 [2023-12-15 21:22:36,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2023-12-15 21:22:36,127 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 1761 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:36,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 3248 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 21:22:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2023-12-15 21:22:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 867. [2023-12-15 21:22:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 717 states have (on average 1.4741980474198046) internal successors, (1057), 717 states have internal predecessors, (1057), 126 states have call successors, (126), 23 states have call predecessors, (126), 23 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1309 transitions. [2023-12-15 21:22:36,220 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1309 transitions. Word has length 443 [2023-12-15 21:22:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:36,220 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1309 transitions. [2023-12-15 21:22:36,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.916666666666666) internal successors, (131), 11 states have internal predecessors, (131), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1309 transitions. [2023-12-15 21:22:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-15 21:22:36,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:36,224 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:36,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:36,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:36,434 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:36,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1173808734, now seen corresponding path program 1 times [2023-12-15 21:22:36,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:36,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580442480] [2023-12-15 21:22:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:36,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:36,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878622193] [2023-12-15 21:22:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:36,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:36,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:36,487 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:22:36,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-15 21:22:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:36,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:22:36,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 5628 proven. 102 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2023-12-15 21:22:37,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 84 proven. 102 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580442480] [2023-12-15 21:22:38,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878622193] [2023-12-15 21:22:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878622193] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:38,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:38,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-15 21:22:38,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082626358] [2023-12-15 21:22:38,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:38,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-15 21:22:38,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-15 21:22:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-12-15 21:22:38,233 INFO L87 Difference]: Start difference. First operand 867 states and 1309 transitions. Second operand has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 7 states have call successors, (104), 4 states have call predecessors, (104), 6 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) [2023-12-15 21:22:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:39,233 INFO L93 Difference]: Finished difference Result 1654 states and 2474 transitions. [2023-12-15 21:22:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 21:22:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 7 states have call successors, (104), 4 states have call predecessors, (104), 6 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) Word has length 443 [2023-12-15 21:22:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:39,239 INFO L225 Difference]: With dead ends: 1654 [2023-12-15 21:22:39,239 INFO L226 Difference]: Without dead ends: 1170 [2023-12-15 21:22:39,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2023-12-15 21:22:39,241 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 1371 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:39,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 1266 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 21:22:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2023-12-15 21:22:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 732. [2023-12-15 21:22:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 580 states have (on average 1.4310344827586208) internal successors, (830), 580 states have internal predecessors, (830), 126 states have call successors, (126), 25 states have call predecessors, (126), 25 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1082 transitions. [2023-12-15 21:22:39,324 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1082 transitions. Word has length 443 [2023-12-15 21:22:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:39,324 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 1082 transitions. [2023-12-15 21:22:39,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 7 states have call successors, (104), 4 states have call predecessors, (104), 6 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) [2023-12-15 21:22:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1082 transitions. [2023-12-15 21:22:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-12-15 21:22:39,327 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:39,328 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:39,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-15 21:22:39,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:39,536 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:39,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1392222954, now seen corresponding path program 1 times [2023-12-15 21:22:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381278655] [2023-12-15 21:22:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:39,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:39,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:39,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501959593] [2023-12-15 21:22:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:39,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:39,576 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) [2023-12-15 21:22:39,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-15 21:22:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:39,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 21:22:39,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 308 proven. 183 refuted. 0 times theorem prover too weak. 7321 trivial. 0 not checked. [2023-12-15 21:22:40,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3 proven. 183 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381278655] [2023-12-15 21:22:40,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501959593] [2023-12-15 21:22:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501959593] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:40,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:40,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-15 21:22:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625260965] [2023-12-15 21:22:40,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 21:22:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 21:22:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-15 21:22:40,897 INFO L87 Difference]: Start difference. First operand 732 states and 1082 transitions. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-15 21:22:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:41,834 INFO L93 Difference]: Finished difference Result 1170 states and 1724 transitions. [2023-12-15 21:22:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 21:22:41,834 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 444 [2023-12-15 21:22:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:41,837 INFO L225 Difference]: With dead ends: 1170 [2023-12-15 21:22:41,837 INFO L226 Difference]: Without dead ends: 654 [2023-12-15 21:22:41,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 876 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2023-12-15 21:22:41,838 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 770 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:41,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1052 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 21:22:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2023-12-15 21:22:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 619. [2023-12-15 21:22:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 467 states have (on average 1.3747323340471092) internal successors, (642), 467 states have internal predecessors, (642), 126 states have call successors, (126), 25 states have call predecessors, (126), 25 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 894 transitions. [2023-12-15 21:22:41,919 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 894 transitions. Word has length 444 [2023-12-15 21:22:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:41,919 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 894 transitions. [2023-12-15 21:22:41,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-15 21:22:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 894 transitions. [2023-12-15 21:22:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-12-15 21:22:41,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:41,923 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:41,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:42,131 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 [2023-12-15 21:22:42,131 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:42,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1119763870, now seen corresponding path program 1 times [2023-12-15 21:22:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:42,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247258674] [2023-12-15 21:22:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:42,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:42,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332003587] [2023-12-15 21:22:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:42,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:42,174 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) [2023-12-15 21:22:42,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-15 21:22:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:42,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:22:42,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-12-15 21:22:42,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:22:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247258674] [2023-12-15 21:22:42,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332003587] [2023-12-15 21:22:42,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332003587] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:22:42,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:22:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:22:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335503852] [2023-12-15 21:22:42,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:22:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:22:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:22:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:22:42,643 INFO L87 Difference]: Start difference. First operand 619 states and 894 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:42,774 INFO L93 Difference]: Finished difference Result 1038 states and 1511 transitions. [2023-12-15 21:22:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:22:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 444 [2023-12-15 21:22:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:42,777 INFO L225 Difference]: With dead ends: 1038 [2023-12-15 21:22:42,777 INFO L226 Difference]: Without dead ends: 619 [2023-12-15 21:22:42,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:22:42,779 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 415 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:42,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1183 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:22:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-12-15 21:22:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2023-12-15 21:22:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 467 states have (on average 1.36830835117773) internal successors, (639), 467 states have internal predecessors, (639), 126 states have call successors, (126), 25 states have call predecessors, (126), 25 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-12-15 21:22:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 891 transitions. [2023-12-15 21:22:42,870 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 891 transitions. Word has length 444 [2023-12-15 21:22:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:42,871 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 891 transitions. [2023-12-15 21:22:42,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-12-15 21:22:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 891 transitions. [2023-12-15 21:22:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-12-15 21:22:42,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:42,874 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:42,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:43,082 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 [2023-12-15 21:22:43,083 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:43,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash -675863196, now seen corresponding path program 1 times [2023-12-15 21:22:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644251912] [2023-12-15 21:22:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:43,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:43,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301953756] [2023-12-15 21:22:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:43,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:43,125 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) [2023-12-15 21:22:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-15 21:22:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:43,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:22:43,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 2328 proven. 153 refuted. 0 times theorem prover too weak. 5331 trivial. 0 not checked. [2023-12-15 21:22:44,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:22:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 33 proven. 153 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-12-15 21:22:45,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:22:45,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644251912] [2023-12-15 21:22:45,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:22:45,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301953756] [2023-12-15 21:22:45,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301953756] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:22:45,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:22:45,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-15 21:22:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865112486] [2023-12-15 21:22:45,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:22:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 21:22:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:22:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 21:22:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:22:45,020 INFO L87 Difference]: Start difference. First operand 619 states and 891 transitions. Second operand has 12 states, 12 states have (on average 19.833333333333332) internal successors, (238), 12 states have internal predecessors, (238), 4 states have call successors, (126), 3 states have call predecessors, (126), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-12-15 21:22:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:22:46,988 INFO L93 Difference]: Finished difference Result 2827 states and 4059 transitions. [2023-12-15 21:22:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-15 21:22:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.833333333333332) internal successors, (238), 12 states have internal predecessors, (238), 4 states have call successors, (126), 3 states have call predecessors, (126), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) Word has length 444 [2023-12-15 21:22:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:22:46,998 INFO L225 Difference]: With dead ends: 2827 [2023-12-15 21:22:46,998 INFO L226 Difference]: Without dead ends: 2434 [2023-12-15 21:22:46,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 21:22:47,000 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 1763 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1848 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:22:47,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1848 Valid, 2371 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-15 21:22:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2023-12-15 21:22:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1143. [2023-12-15 21:22:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 913 states have (on average 1.4194961664841184) internal successors, (1296), 913 states have internal predecessors, (1296), 189 states have call successors, (189), 40 states have call predecessors, (189), 40 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-12-15 21:22:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1674 transitions. [2023-12-15 21:22:47,147 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1674 transitions. Word has length 444 [2023-12-15 21:22:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:22:47,148 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1674 transitions. [2023-12-15 21:22:47,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.833333333333332) internal successors, (238), 12 states have internal predecessors, (238), 4 states have call successors, (126), 3 states have call predecessors, (126), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-12-15 21:22:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1674 transitions. [2023-12-15 21:22:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-12-15 21:22:47,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:22:47,151 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:47,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:47,360 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 [2023-12-15 21:22:47,360 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:22:47,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:22:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1070229982, now seen corresponding path program 1 times [2023-12-15 21:22:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:22:47,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485074532] [2023-12-15 21:22:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:22:47,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:22:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667939881] [2023-12-15 21:22:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:22:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:22:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:22:47,409 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) [2023-12-15 21:22:47,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-15 21:22:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:22:48,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-15 21:22:48,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:22:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 4812 proven. 330 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-12-15 21:22:48,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-15 21:22:49,547 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:22:49,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-15 21:22:49,565 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:22:49,585 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:22:49,756 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 [2023-12-15 21:22:49,756 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 445 with TraceHistMax 63,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. [2023-12-15 21:22:49,759 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:22:49,762 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:22:49,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:22:49 BoogieIcfgContainer [2023-12-15 21:22:49,764 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:22:49,765 INFO L158 Benchmark]: Toolchain (without parser) took 54006.38ms. Allocated memory was 210.8MB in the beginning and 857.7MB in the end (delta: 647.0MB). Free memory was 156.3MB in the beginning and 392.1MB in the end (delta: -235.8MB). Peak memory consumption was 412.2MB. Max. memory is 8.0GB. [2023-12-15 21:22:49,765 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 210.8MB. Free memory is still 158.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:22:49,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 583.26ms. Allocated memory is still 210.8MB. Free memory was 156.3MB in the beginning and 119.6MB in the end (delta: 36.7MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2023-12-15 21:22:49,765 INFO L158 Benchmark]: Boogie Procedure Inliner took 111.27ms. Allocated memory is still 210.8MB. Free memory was 119.6MB in the beginning and 102.3MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-15 21:22:49,765 INFO L158 Benchmark]: Boogie Preprocessor took 176.23ms. Allocated memory was 210.8MB in the beginning and 362.8MB in the end (delta: 152.0MB). Free memory was 102.3MB in the beginning and 301.8MB in the end (delta: -199.5MB). Peak memory consumption was 30.6MB. Max. memory is 8.0GB. [2023-12-15 21:22:49,765 INFO L158 Benchmark]: RCFGBuilder took 1091.27ms. Allocated memory is still 362.8MB. Free memory was 301.8MB in the beginning and 203.3MB in the end (delta: 98.6MB). Peak memory consumption was 98.6MB. Max. memory is 8.0GB. [2023-12-15 21:22:49,766 INFO L158 Benchmark]: TraceAbstraction took 52029.29ms. Allocated memory was 362.8MB in the beginning and 857.7MB in the end (delta: 494.9MB). Free memory was 202.7MB in the beginning and 392.1MB in the end (delta: -189.4MB). Peak memory consumption was 305.0MB. Max. memory is 8.0GB. [2023-12-15 21:22:49,767 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 210.8MB. Free memory is still 158.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 583.26ms. Allocated memory is still 210.8MB. Free memory was 156.3MB in the beginning and 119.6MB in the end (delta: 36.7MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 111.27ms. Allocated memory is still 210.8MB. Free memory was 119.6MB in the beginning and 102.3MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 176.23ms. Allocated memory was 210.8MB in the beginning and 362.8MB in the end (delta: 152.0MB). Free memory was 102.3MB in the beginning and 301.8MB in the end (delta: -199.5MB). Peak memory consumption was 30.6MB. Max. memory is 8.0GB. * RCFGBuilder took 1091.27ms. Allocated memory is still 362.8MB. Free memory was 301.8MB in the beginning and 203.3MB in the end (delta: 98.6MB). Peak memory consumption was 98.6MB. Max. memory is 8.0GB. * TraceAbstraction took 52029.29ms. Allocated memory was 362.8MB in the beginning and 857.7MB in the end (delta: 494.9MB). Free memory was 202.7MB in the beginning and 392.1MB in the end (delta: -189.4MB). Peak memory consumption was 305.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 445 with TraceHistMax 63,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 246 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 52.0s, OverallIterations: 26, TraceHistogramMax: 63, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 14.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19054 SdHoareTripleChecker+Valid, 10.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18827 mSDsluCounter, 35457 SdHoareTripleChecker+Invalid, 8.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25239 mSDsCounter, 4268 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10433 IncrementalHoareTripleChecker+Invalid, 14701 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4268 mSolverCounterUnsat, 10218 mSDtfsCounter, 10433 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15121 GetRequests, 14840 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1143occurred in iteration=25, InterpolantAutomatonStates: 244, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 25 MinimizatonAttempts, 6381 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 11461 NumberOfCodeBlocks, 11461 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 14967 ConstructedInterpolants, 0 QuantifiedInterpolants, 57176 SizeOfPredicates, 108 NumberOfNonLiveVariables, 27974 ConjunctsInSsa, 209 ConjunctsInUnsatCore, 34 InterpolantComputations, 16 PerfectInterpolantSequences, 262851/265608 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown