/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_fillercode_fillercodesize_ps-cn-500_file-80.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 07:50:51,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 07:50:51,121 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 07:50:51,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 07:50:51,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 07:50:51,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 07:50:51,138 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 07:50:51,138 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 07:50:51,139 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 07:50:51,139 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 07:50:51,139 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 07:50:51,139 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 07:50:51,140 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 07:50:51,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 07:50:51,140 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 07:50:51,141 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 07:50:51,141 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 07:50:51,141 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 07:50:51,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 07:50:51,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 07:50:51,142 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 07:50:51,142 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 07:50:51,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 07:50:51,143 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 07:50:51,143 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 07:50:51,143 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 07:50:51,144 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 07:50:51,144 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 07:50:51,144 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 07:50:51,145 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 07:50:51,145 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 07:50:51,145 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 07:50:51,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 07:50:51,146 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 07:50:51,146 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 07:50:51,146 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 07:50:51,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 07:50:51,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 07:50:51,147 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 07:50:51,147 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 07:50:51,148 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 07:50:51,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 07:50:51,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 07:50:51,149 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 07:50:51,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 07:50:51,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 07:50:51,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 07:50:51,425 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 07:50:51,425 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 07:50:51,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-80.i [2023-12-19 07:50:52,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 07:50:52,949 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 07:50:52,950 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-80.i [2023-12-19 07:50:52,979 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0391496/856923083e964740a785fd4824c8b7ec/FLAG1225a8fe6 [2023-12-19 07:50:52,991 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0391496/856923083e964740a785fd4824c8b7ec [2023-12-19 07:50:52,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 07:50:52,994 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 07:50:52,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 07:50:52,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 07:50:52,999 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 07:50:52,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:50:52" (1/1) ... [2023-12-19 07:50:53,001 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f00d29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53, skipping insertion in model container [2023-12-19 07:50:53,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:50:52" (1/1) ... [2023-12-19 07:50:53,045 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 07:50:53,145 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_fillercode_fillercodesize_ps-cn-500_file-80.i[916,929] [2023-12-19 07:50:53,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 07:50:53,364 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 07:50:53,377 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_fillercode_fillercodesize_ps-cn-500_file-80.i[916,929] [2023-12-19 07:50:53,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 07:50:53,478 INFO L206 MainTranslator]: Completed translation [2023-12-19 07:50:53,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53 WrapperNode [2023-12-19 07:50:53,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 07:50:53,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 07:50:53,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 07:50:53,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 07:50:53,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,619 INFO L138 Inliner]: procedures = 26, calls = 97, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 772 [2023-12-19 07:50:53,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 07:50:53,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 07:50:53,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 07:50:53,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 07:50:53,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,690 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 07:50:53,691 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,691 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 07:50:53,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 07:50:53,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 07:50:53,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 07:50:53,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (1/1) ... [2023-12-19 07:50:53,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 07:50:53,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:50:53,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 07:50:53,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 07:50:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 07:50:53,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 07:50:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 07:50:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 07:50:53,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 07:50:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 07:50:53,946 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 07:50:53,947 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 07:50:54,789 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 07:50:54,847 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 07:50:54,847 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 07:50:54,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:50:54 BoogieIcfgContainer [2023-12-19 07:50:54,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 07:50:54,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 07:50:54,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 07:50:54,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 07:50:54,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 07:50:52" (1/3) ... [2023-12-19 07:50:54,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6426c52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:50:54, skipping insertion in model container [2023-12-19 07:50:54,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:50:53" (2/3) ... [2023-12-19 07:50:54,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6426c52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:50:54, skipping insertion in model container [2023-12-19 07:50:54,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:50:54" (3/3) ... [2023-12-19 07:50:54,855 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-80.i [2023-12-19 07:50:54,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 07:50:54,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 07:50:54,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 07:50:54,925 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;@3f88f0ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 07:50:54,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 07:50:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 200 states have (on average 1.68) internal successors, (336), 201 states have internal predecessors, (336), 84 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-19 07:50:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2023-12-19 07:50:54,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:50:54,972 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:50:54,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:50:54,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:50:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash 246105275, now seen corresponding path program 1 times [2023-12-19 07:50:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:50:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185411422] [2023-12-19 07:50:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:50:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:50:55,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:50:55,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185411422] [2023-12-19 07:50:55,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 07:50:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911562691] [2023-12-19 07:50:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:55,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:55,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:50:55,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:50:55,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 07:50:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:50:55,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 07:50:55,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:50:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2023-12-19 07:50:55,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:50:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911562691] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:50:55,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:50:55,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 07:50:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725466829] [2023-12-19 07:50:55,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:50:55,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 07:50:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:50:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 07:50:55,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 07:50:55,877 INFO L87 Difference]: Start difference. First operand has 287 states, 200 states have (on average 1.68) internal successors, (336), 201 states have internal predecessors, (336), 84 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 2 states have call successors, (84) [2023-12-19 07:50:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:50:55,982 INFO L93 Difference]: Finished difference Result 571 states and 1090 transitions. [2023-12-19 07:50:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 07:50:55,986 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 2 states have call successors, (84) Word has length 564 [2023-12-19 07:50:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:50:56,007 INFO L225 Difference]: With dead ends: 571 [2023-12-19 07:50:56,008 INFO L226 Difference]: Without dead ends: 285 [2023-12-19 07:50:56,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 07:50:56,017 INFO L413 NwaCegarLoop]: 492 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, 492 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:50:56,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 492 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:50:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-12-19 07:50:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2023-12-19 07:50:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 199 states have (on average 1.64321608040201) internal successors, (327), 199 states have internal predecessors, (327), 84 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-19 07:50:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 495 transitions. [2023-12-19 07:50:56,138 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 495 transitions. Word has length 564 [2023-12-19 07:50:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:50:56,140 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 495 transitions. [2023-12-19 07:50:56,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 2 states have call successors, (84) [2023-12-19 07:50:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 495 transitions. [2023-12-19 07:50:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:50:56,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:50:56,161 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:50:56,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 07:50:56,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 07:50:56,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:50:56,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:50:56,374 INFO L85 PathProgramCache]: Analyzing trace with hash -645749855, now seen corresponding path program 1 times [2023-12-19 07:50:56,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:50:56,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655664952] [2023-12-19 07:50:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:56,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:50:56,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:50:56,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190210263] [2023-12-19 07:50:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:56,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:56,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:50:56,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:50:56,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 07:50:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:50:57,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 1334 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:50:57,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:50:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:50:57,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:50:57,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:50:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655664952] [2023-12-19 07:50:57,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:50:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190210263] [2023-12-19 07:50:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190210263] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:50:57,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:50:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:50:57,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792209406] [2023-12-19 07:50:57,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:50:57,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:50:57,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:50:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:50:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:57,116 INFO L87 Difference]: Start difference. First operand 285 states and 495 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:50:57,219 INFO L93 Difference]: Finished difference Result 851 states and 1479 transitions. [2023-12-19 07:50:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:50:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:50:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:50:57,226 INFO L225 Difference]: With dead ends: 851 [2023-12-19 07:50:57,226 INFO L226 Difference]: Without dead ends: 567 [2023-12-19 07:50:57,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:57,229 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 476 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:50:57,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1202 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:50:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-19 07:50:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 393. [2023-12-19 07:50:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 307 states have (on average 1.729641693811075) internal successors, (531), 307 states have internal predecessors, (531), 84 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-19 07:50:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 699 transitions. [2023-12-19 07:50:57,276 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 699 transitions. Word has length 565 [2023-12-19 07:50:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:50:57,279 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 699 transitions. [2023-12-19 07:50:57,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 699 transitions. [2023-12-19 07:50:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:50:57,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:50:57,284 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:50:57,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 07:50:57,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 07:50:57,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:50:57,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:50:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1088354595, now seen corresponding path program 1 times [2023-12-19 07:50:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:50:57,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923661725] [2023-12-19 07:50:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:57,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:50:57,604 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:50:57,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049834886] [2023-12-19 07:50:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:57,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:57,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:50:57,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:50:57,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 07:50:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:50:57,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:50:58,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:50:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:50:58,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:50:58,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:50:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923661725] [2023-12-19 07:50:58,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:50:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049834886] [2023-12-19 07:50:58,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049834886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:50:58,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:50:58,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:50:58,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981756741] [2023-12-19 07:50:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:50:58,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:50:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:50:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:50:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:58,075 INFO L87 Difference]: Start difference. First operand 393 states and 699 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:50:58,118 INFO L93 Difference]: Finished difference Result 1072 states and 1919 transitions. [2023-12-19 07:50:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:50:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:50:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:50:58,123 INFO L225 Difference]: With dead ends: 1072 [2023-12-19 07:50:58,124 INFO L226 Difference]: Without dead ends: 680 [2023-12-19 07:50:58,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:58,127 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 306 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:50:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 963 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:50:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-12-19 07:50:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 677. [2023-12-19 07:50:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 561 states have (on average 1.7593582887700534) internal successors, (987), 562 states have internal predecessors, (987), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 112 states have call predecessors, (113), 113 states have call successors, (113) [2023-12-19 07:50:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1213 transitions. [2023-12-19 07:50:58,164 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1213 transitions. Word has length 565 [2023-12-19 07:50:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:50:58,165 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1213 transitions. [2023-12-19 07:50:58,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1213 transitions. [2023-12-19 07:50:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:50:58,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:50:58,169 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:50:58,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 07:50:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:58,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:50:58,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:50:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash 779657392, now seen corresponding path program 1 times [2023-12-19 07:50:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:50:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070369256] [2023-12-19 07:50:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:50:58,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:50:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098338611] [2023-12-19 07:50:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:58,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:50:58,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:50:58,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 07:50:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:50:58,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:50:58,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:50:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:50:58,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:50:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:50:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070369256] [2023-12-19 07:50:58,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:50:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098338611] [2023-12-19 07:50:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098338611] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:50:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:50:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:50:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790481675] [2023-12-19 07:50:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:50:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:50:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:50:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:50:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:58,810 INFO L87 Difference]: Start difference. First operand 677 states and 1213 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:50:58,859 INFO L93 Difference]: Finished difference Result 1871 states and 3352 transitions. [2023-12-19 07:50:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:50:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:50:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:50:58,865 INFO L225 Difference]: With dead ends: 1871 [2023-12-19 07:50:58,866 INFO L226 Difference]: Without dead ends: 1195 [2023-12-19 07:50:58,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:58,868 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 344 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:50:58,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1213 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:50:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2023-12-19 07:50:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1192. [2023-12-19 07:50:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 992 states have (on average 1.7419354838709677) internal successors, (1728), 995 states have internal predecessors, (1728), 195 states have call successors, (195), 4 states have call predecessors, (195), 4 states have return successors, (195), 192 states have call predecessors, (195), 195 states have call successors, (195) [2023-12-19 07:50:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2118 transitions. [2023-12-19 07:50:58,907 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2118 transitions. Word has length 565 [2023-12-19 07:50:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:50:58,907 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 2118 transitions. [2023-12-19 07:50:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2118 transitions. [2023-12-19 07:50:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:50:58,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:50:58,912 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:50:58,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 07:50:59,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:59,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:50:59,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:50:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash -906522446, now seen corresponding path program 1 times [2023-12-19 07:50:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:50:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576769863] [2023-12-19 07:50:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:50:59,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:50:59,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976433123] [2023-12-19 07:50:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:59,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:59,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:50:59,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:50:59,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 07:50:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:50:59,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:50:59,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:50:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:50:59,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:50:59,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:50:59,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576769863] [2023-12-19 07:50:59,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:50:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976433123] [2023-12-19 07:50:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976433123] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:50:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:50:59,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:50:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77857832] [2023-12-19 07:50:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:50:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:50:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:50:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:50:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:59,614 INFO L87 Difference]: Start difference. First operand 1192 states and 2118 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:50:59,680 INFO L93 Difference]: Finished difference Result 2390 states and 4240 transitions. [2023-12-19 07:50:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:50:59,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:50:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:50:59,686 INFO L225 Difference]: With dead ends: 2390 [2023-12-19 07:50:59,686 INFO L226 Difference]: Without dead ends: 1199 [2023-12-19 07:50:59,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:50:59,689 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 288 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:50:59,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1004 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:50:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-12-19 07:50:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 989. [2023-12-19 07:50:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 872 states have (on average 1.7706422018348624) internal successors, (1544), 873 states have internal predecessors, (1544), 113 states have call successors, (113), 3 states have call predecessors, (113), 3 states have return successors, (113), 112 states have call predecessors, (113), 113 states have call successors, (113) [2023-12-19 07:50:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1770 transitions. [2023-12-19 07:50:59,725 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1770 transitions. Word has length 565 [2023-12-19 07:50:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:50:59,727 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1770 transitions. [2023-12-19 07:50:59,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:50:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1770 transitions. [2023-12-19 07:50:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:50:59,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:50:59,732 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:50:59,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 07:50:59,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:50:59,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:50:59,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:50:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1871694836, now seen corresponding path program 1 times [2023-12-19 07:50:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:50:59,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031491738] [2023-12-19 07:50:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:50:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:00,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:00,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723856472] [2023-12-19 07:51:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:00,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:00,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:00,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:00,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 07:51:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:00,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:51:00,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:00,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:00,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031491738] [2023-12-19 07:51:00,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723856472] [2023-12-19 07:51:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723856472] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:00,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:00,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:51:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666049034] [2023-12-19 07:51:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:51:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:51:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:00,534 INFO L87 Difference]: Start difference. First operand 989 states and 1770 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:00,617 INFO L93 Difference]: Finished difference Result 2843 states and 5098 transitions. [2023-12-19 07:51:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:51:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:51:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:00,629 INFO L225 Difference]: With dead ends: 2843 [2023-12-19 07:51:00,629 INFO L226 Difference]: Without dead ends: 1855 [2023-12-19 07:51:00,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:00,635 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 292 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:00,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 966 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:51:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2023-12-19 07:51:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1852. [2023-12-19 07:51:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1667 states have (on average 1.7678464307138573) internal successors, (2947), 1670 states have internal predecessors, (2947), 179 states have call successors, (179), 5 states have call predecessors, (179), 5 states have return successors, (179), 176 states have call predecessors, (179), 179 states have call successors, (179) [2023-12-19 07:51:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 3305 transitions. [2023-12-19 07:51:00,712 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 3305 transitions. Word has length 565 [2023-12-19 07:51:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:00,713 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 3305 transitions. [2023-12-19 07:51:00,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 3305 transitions. [2023-12-19 07:51:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:51:00,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:00,722 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:00,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:00,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:00,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:00,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -576264712, now seen corresponding path program 1 times [2023-12-19 07:51:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319715578] [2023-12-19 07:51:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:00,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599040406] [2023-12-19 07:51:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:00,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:01,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:01,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 07:51:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:01,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:51:01,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:01,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319715578] [2023-12-19 07:51:01,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599040406] [2023-12-19 07:51:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599040406] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:01,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:01,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:51:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964363101] [2023-12-19 07:51:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:01,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:51:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:51:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:01,438 INFO L87 Difference]: Start difference. First operand 1852 states and 3305 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:01,536 INFO L93 Difference]: Finished difference Result 4341 states and 7666 transitions. [2023-12-19 07:51:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:51:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:51:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:01,551 INFO L225 Difference]: With dead ends: 4341 [2023-12-19 07:51:01,551 INFO L226 Difference]: Without dead ends: 2490 [2023-12-19 07:51:01,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:01,563 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 219 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:01,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 972 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:51:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2023-12-19 07:51:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2487. [2023-12-19 07:51:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2144 states have (on average 1.7070895522388059) internal successors, (3660), 2151 states have internal predecessors, (3660), 332 states have call successors, (332), 10 states have call predecessors, (332), 10 states have return successors, (332), 325 states have call predecessors, (332), 332 states have call successors, (332) [2023-12-19 07:51:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 4324 transitions. [2023-12-19 07:51:01,739 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 4324 transitions. Word has length 565 [2023-12-19 07:51:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:01,740 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 4324 transitions. [2023-12-19 07:51:01,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 4324 transitions. [2023-12-19 07:51:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:51:01,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:01,750 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:01,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:01,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:01,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash -514225098, now seen corresponding path program 1 times [2023-12-19 07:51:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542927970] [2023-12-19 07:51:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:02,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:02,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696587574] [2023-12-19 07:51:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:02,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:02,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:02,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:02,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 07:51:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:02,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:51:02,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:02,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542927970] [2023-12-19 07:51:02,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696587574] [2023-12-19 07:51:02,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696587574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:02,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:02,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:51:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184812424] [2023-12-19 07:51:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:51:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:51:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:02,527 INFO L87 Difference]: Start difference. First operand 2487 states and 4324 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:02,652 INFO L93 Difference]: Finished difference Result 7215 states and 12526 transitions. [2023-12-19 07:51:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:51:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:51:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:02,670 INFO L225 Difference]: With dead ends: 7215 [2023-12-19 07:51:02,670 INFO L226 Difference]: Without dead ends: 4729 [2023-12-19 07:51:02,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:02,678 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 305 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:02,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1031 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:51:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2023-12-19 07:51:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 4725. [2023-12-19 07:51:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 4082 states have (on average 1.6952474277315042) internal successors, (6920), 4097 states have internal predecessors, (6920), 624 states have call successors, (624), 18 states have call predecessors, (624), 18 states have return successors, (624), 609 states have call predecessors, (624), 624 states have call successors, (624) [2023-12-19 07:51:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 8168 transitions. [2023-12-19 07:51:02,833 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 8168 transitions. Word has length 565 [2023-12-19 07:51:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:02,834 INFO L495 AbstractCegarLoop]: Abstraction has 4725 states and 8168 transitions. [2023-12-19 07:51:02,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 8168 transitions. [2023-12-19 07:51:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:51:02,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:02,843 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:02,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 07:51:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 07:51:03,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:03,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1869699640, now seen corresponding path program 1 times [2023-12-19 07:51:03,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:03,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315528562] [2023-12-19 07:51:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:03,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:03,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219893422] [2023-12-19 07:51:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:03,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:03,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 07:51:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:03,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:51:03,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:04,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:04,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315528562] [2023-12-19 07:51:04,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:04,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219893422] [2023-12-19 07:51:04,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219893422] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:04,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:51:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70313392] [2023-12-19 07:51:04,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:04,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:51:04,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:51:04,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:51:04,609 INFO L87 Difference]: Start difference. First operand 4725 states and 8168 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:05,133 INFO L93 Difference]: Finished difference Result 18737 states and 32381 transitions. [2023-12-19 07:51:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 07:51:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:51:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:05,181 INFO L225 Difference]: With dead ends: 18737 [2023-12-19 07:51:05,181 INFO L226 Difference]: Without dead ends: 14013 [2023-12-19 07:51:05,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:51:05,195 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 666 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:05,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 1563 Invalid, 221 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 07:51:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2023-12-19 07:51:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13993. [2023-12-19 07:51:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13993 states, 12066 states have (on average 1.6797613127797115) internal successors, (20268), 12111 states have internal predecessors, (20268), 1872 states have call successors, (1872), 54 states have call predecessors, (1872), 54 states have return successors, (1872), 1827 states have call predecessors, (1872), 1872 states have call successors, (1872) [2023-12-19 07:51:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13993 states to 13993 states and 24012 transitions. [2023-12-19 07:51:05,982 INFO L78 Accepts]: Start accepts. Automaton has 13993 states and 24012 transitions. Word has length 565 [2023-12-19 07:51:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:05,983 INFO L495 AbstractCegarLoop]: Abstraction has 13993 states and 24012 transitions. [2023-12-19 07:51:05,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 13993 states and 24012 transitions. [2023-12-19 07:51:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:51:06,004 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:06,004 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:06,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:06,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:06,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:06,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1189641270, now seen corresponding path program 1 times [2023-12-19 07:51:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:06,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195693016] [2023-12-19 07:51:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:06,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:06,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:06,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905684963] [2023-12-19 07:51:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:06,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:06,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:06,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 07:51:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:06,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 07:51:06,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:06,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:06,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:06,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195693016] [2023-12-19 07:51:06,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:06,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905684963] [2023-12-19 07:51:06,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905684963] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:06,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:06,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:51:06,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674673893] [2023-12-19 07:51:06,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:06,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:51:06,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:06,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:51:06,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:51:06,714 INFO L87 Difference]: Start difference. First operand 13993 states and 24012 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:07,381 INFO L93 Difference]: Finished difference Result 32709 states and 56190 transitions. [2023-12-19 07:51:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 07:51:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:51:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:07,452 INFO L225 Difference]: With dead ends: 32709 [2023-12-19 07:51:07,452 INFO L226 Difference]: Without dead ends: 27985 [2023-12-19 07:51:07,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:07,478 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 506 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:07,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1482 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:51:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27985 states. [2023-12-19 07:51:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27985 to 14089. [2023-12-19 07:51:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14089 states, 12162 states have (on average 1.6743956586087814) internal successors, (20364), 12207 states have internal predecessors, (20364), 1872 states have call successors, (1872), 54 states have call predecessors, (1872), 54 states have return successors, (1872), 1827 states have call predecessors, (1872), 1872 states have call successors, (1872) [2023-12-19 07:51:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14089 states to 14089 states and 24108 transitions. [2023-12-19 07:51:08,188 INFO L78 Accepts]: Start accepts. Automaton has 14089 states and 24108 transitions. Word has length 565 [2023-12-19 07:51:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:08,189 INFO L495 AbstractCegarLoop]: Abstraction has 14089 states and 24108 transitions. [2023-12-19 07:51:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 14089 states and 24108 transitions. [2023-12-19 07:51:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-19 07:51:08,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:08,204 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:08,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:08,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 07:51:08,413 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:08,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1890705848, now seen corresponding path program 1 times [2023-12-19 07:51:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:08,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953889111] [2023-12-19 07:51:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:08,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:08,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:08,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576374942] [2023-12-19 07:51:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:08,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:08,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:08,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 07:51:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:08,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 07:51:08,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:08,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:08,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:08,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953889111] [2023-12-19 07:51:08,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:08,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576374942] [2023-12-19 07:51:08,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576374942] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:08,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:08,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 07:51:08,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507686396] [2023-12-19 07:51:08,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:08,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 07:51:08,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:08,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 07:51:08,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:08,846 INFO L87 Difference]: Start difference. First operand 14089 states and 24108 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:09,156 INFO L93 Difference]: Finished difference Result 23359 states and 39921 transitions. [2023-12-19 07:51:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 07:51:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 565 [2023-12-19 07:51:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:09,176 INFO L225 Difference]: With dead ends: 23359 [2023-12-19 07:51:09,177 INFO L226 Difference]: Without dead ends: 9271 [2023-12-19 07:51:09,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 07:51:09,203 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 13 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:09,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 956 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 07:51:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9271 states. [2023-12-19 07:51:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9271 to 9271. [2023-12-19 07:51:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9271 states, 7986 states have (on average 1.6636614074630605) internal successors, (13286), 8016 states have internal predecessors, (13286), 1248 states have call successors, (1248), 36 states have call predecessors, (1248), 36 states have return successors, (1248), 1218 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-12-19 07:51:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9271 states to 9271 states and 15782 transitions. [2023-12-19 07:51:09,499 INFO L78 Accepts]: Start accepts. Automaton has 9271 states and 15782 transitions. Word has length 565 [2023-12-19 07:51:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:09,500 INFO L495 AbstractCegarLoop]: Abstraction has 9271 states and 15782 transitions. [2023-12-19 07:51:09,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 9271 states and 15782 transitions. [2023-12-19 07:51:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-12-19 07:51:09,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:09,517 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:09,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:09,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 07:51:09,726 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:09,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash 198700663, now seen corresponding path program 1 times [2023-12-19 07:51:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:09,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351659849] [2023-12-19 07:51:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:09,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:09,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518206846] [2023-12-19 07:51:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:09,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:09,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:09,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 07:51:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:10,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 07:51:10,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:10,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:10,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:10,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351659849] [2023-12-19 07:51:10,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:10,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518206846] [2023-12-19 07:51:10,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518206846] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:10,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:10,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:51:10,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488580484] [2023-12-19 07:51:10,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 07:51:10,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 07:51:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 07:51:10,292 INFO L87 Difference]: Start difference. First operand 9271 states and 15782 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:10,901 INFO L93 Difference]: Finished difference Result 27615 states and 47058 transitions. [2023-12-19 07:51:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:51:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 567 [2023-12-19 07:51:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:10,948 INFO L225 Difference]: With dead ends: 27615 [2023-12-19 07:51:10,949 INFO L226 Difference]: Without dead ends: 18345 [2023-12-19 07:51:10,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:10,975 INFO L413 NwaCegarLoop]: 1215 mSDtfsCounter, 928 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:10,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 2918 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 07:51:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18345 states. [2023-12-19 07:51:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18345 to 7963. [2023-12-19 07:51:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7274 states have (on average 1.7011273027220237) internal successors, (12374), 7288 states have internal predecessors, (12374), 664 states have call successors, (664), 24 states have call predecessors, (664), 24 states have return successors, (664), 650 states have call predecessors, (664), 664 states have call successors, (664) [2023-12-19 07:51:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 13702 transitions. [2023-12-19 07:51:11,557 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 13702 transitions. Word has length 567 [2023-12-19 07:51:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:11,558 INFO L495 AbstractCegarLoop]: Abstraction has 7963 states and 13702 transitions. [2023-12-19 07:51:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 13702 transitions. [2023-12-19 07:51:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-12-19 07:51:11,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:11,581 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:11,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 07:51:11,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:11,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1389647239, now seen corresponding path program 1 times [2023-12-19 07:51:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345625425] [2023-12-19 07:51:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:11,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:11,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:11,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533819292] [2023-12-19 07:51:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:11,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:11,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:11,875 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:11,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 07:51:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:12,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 1328 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:51:12,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 7025 proven. 132 refuted. 0 times theorem prover too weak. 6787 trivial. 0 not checked. [2023-12-19 07:51:12,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:51:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 117 proven. 132 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:51:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345625425] [2023-12-19 07:51:13,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533819292] [2023-12-19 07:51:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533819292] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:51:13,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:51:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 07:51:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210409084] [2023-12-19 07:51:13,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:51:13,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 07:51:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 07:51:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 07:51:13,079 INFO L87 Difference]: Start difference. First operand 7963 states and 13702 transitions. Second operand has 8 states, 8 states have (on average 27.625) internal successors, (221), 8 states have internal predecessors, (221), 3 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 3 states have call predecessors, (129), 3 states have call successors, (129) [2023-12-19 07:51:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:13,707 INFO L93 Difference]: Finished difference Result 15981 states and 27455 transitions. [2023-12-19 07:51:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:51:13,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.625) internal successors, (221), 8 states have internal predecessors, (221), 3 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 3 states have call predecessors, (129), 3 states have call successors, (129) Word has length 567 [2023-12-19 07:51:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:13,722 INFO L225 Difference]: With dead ends: 15981 [2023-12-19 07:51:13,722 INFO L226 Difference]: Without dead ends: 8019 [2023-12-19 07:51:13,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 07:51:13,729 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 550 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:13,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 961 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:51:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8019 states. [2023-12-19 07:51:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8019 to 7979. [2023-12-19 07:51:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 7286 states have (on average 1.6867965962119134) internal successors, (12290), 7300 states have internal predecessors, (12290), 664 states have call successors, (664), 28 states have call predecessors, (664), 28 states have return successors, (664), 650 states have call predecessors, (664), 664 states have call successors, (664) [2023-12-19 07:51:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 13618 transitions. [2023-12-19 07:51:14,045 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 13618 transitions. Word has length 567 [2023-12-19 07:51:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:14,046 INFO L495 AbstractCegarLoop]: Abstraction has 7979 states and 13618 transitions. [2023-12-19 07:51:14,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.625) internal successors, (221), 8 states have internal predecessors, (221), 3 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 3 states have call predecessors, (129), 3 states have call successors, (129) [2023-12-19 07:51:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 13618 transitions. [2023-12-19 07:51:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2023-12-19 07:51:14,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:14,063 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:14,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:14,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 07:51:14,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:14,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1068844572, now seen corresponding path program 1 times [2023-12-19 07:51:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117452237] [2023-12-19 07:51:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:14,329 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:14,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570394866] [2023-12-19 07:51:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:14,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:14,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:14,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 07:51:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:14,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:51:14,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 6713 proven. 96 refuted. 0 times theorem prover too weak. 7135 trivial. 0 not checked. [2023-12-19 07:51:15,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:51:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 153 proven. 96 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:51:15,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117452237] [2023-12-19 07:51:15,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570394866] [2023-12-19 07:51:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570394866] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:51:15,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:51:15,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 07:51:15,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995109879] [2023-12-19 07:51:15,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:51:15,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 07:51:15,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 07:51:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 07:51:15,331 INFO L87 Difference]: Start difference. First operand 7979 states and 13618 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-12-19 07:51:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:15,956 INFO L93 Difference]: Finished difference Result 12941 states and 21931 transitions. [2023-12-19 07:51:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:51:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 568 [2023-12-19 07:51:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:15,976 INFO L225 Difference]: With dead ends: 12941 [2023-12-19 07:51:15,976 INFO L226 Difference]: Without dead ends: 4963 [2023-12-19 07:51:15,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 1128 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 07:51:15,990 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 602 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:15,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1003 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:51:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2023-12-19 07:51:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4923. [2023-12-19 07:51:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4923 states, 4226 states have (on average 1.6379555134879318) internal successors, (6922), 4240 states have internal predecessors, (6922), 664 states have call successors, (664), 32 states have call predecessors, (664), 32 states have return successors, (664), 650 states have call predecessors, (664), 664 states have call successors, (664) [2023-12-19 07:51:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 8250 transitions. [2023-12-19 07:51:16,378 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 8250 transitions. Word has length 568 [2023-12-19 07:51:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:16,379 INFO L495 AbstractCegarLoop]: Abstraction has 4923 states and 8250 transitions. [2023-12-19 07:51:16,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-12-19 07:51:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 8250 transitions. [2023-12-19 07:51:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2023-12-19 07:51:16,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:16,390 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:16,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:16,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:16,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2020816010, now seen corresponding path program 1 times [2023-12-19 07:51:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651015540] [2023-12-19 07:51:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:16,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:16,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806522133] [2023-12-19 07:51:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:16,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:16,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:16,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:16,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 07:51:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:17,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 07:51:17,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:17,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:17,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:17,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651015540] [2023-12-19 07:51:17,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:17,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806522133] [2023-12-19 07:51:17,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806522133] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:17,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:17,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:51:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977843384] [2023-12-19 07:51:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 07:51:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 07:51:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:17,522 INFO L87 Difference]: Start difference. First operand 4923 states and 8250 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:18,211 INFO L93 Difference]: Finished difference Result 11433 states and 18858 transitions. [2023-12-19 07:51:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:51:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 569 [2023-12-19 07:51:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:18,233 INFO L225 Difference]: With dead ends: 11433 [2023-12-19 07:51:18,234 INFO L226 Difference]: Without dead ends: 6375 [2023-12-19 07:51:18,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:18,245 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 836 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:18,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 791 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:51:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2023-12-19 07:51:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6175. [2023-12-19 07:51:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6175 states, 4870 states have (on average 1.5474332648870637) internal successors, (7536), 4900 states have internal predecessors, (7536), 1248 states have call successors, (1248), 56 states have call predecessors, (1248), 56 states have return successors, (1248), 1218 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-12-19 07:51:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 10032 transitions. [2023-12-19 07:51:18,719 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 10032 transitions. Word has length 569 [2023-12-19 07:51:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:18,719 INFO L495 AbstractCegarLoop]: Abstraction has 6175 states and 10032 transitions. [2023-12-19 07:51:18,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 10032 transitions. [2023-12-19 07:51:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2023-12-19 07:51:18,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:18,728 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:18,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 07:51:18,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:18,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2094524214, now seen corresponding path program 1 times [2023-12-19 07:51:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:18,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447207700] [2023-12-19 07:51:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:18,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380398228] [2023-12-19 07:51:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:18,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:19,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:19,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 07:51:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:19,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 07:51:19,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:20,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447207700] [2023-12-19 07:51:20,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380398228] [2023-12-19 07:51:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380398228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:20,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:20,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:51:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834676218] [2023-12-19 07:51:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:20,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 07:51:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 07:51:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:20,186 INFO L87 Difference]: Start difference. First operand 6175 states and 10032 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:21,709 INFO L93 Difference]: Finished difference Result 18395 states and 29838 transitions. [2023-12-19 07:51:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 07:51:21,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 569 [2023-12-19 07:51:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:21,745 INFO L225 Difference]: With dead ends: 18395 [2023-12-19 07:51:21,745 INFO L226 Difference]: Without dead ends: 12221 [2023-12-19 07:51:21,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-19 07:51:21,762 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 1010 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:21,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1279 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 07:51:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2023-12-19 07:51:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 7471. [2023-12-19 07:51:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7471 states, 6166 states have (on average 1.598443074927019) internal successors, (9856), 6196 states have internal predecessors, (9856), 1248 states have call successors, (1248), 56 states have call predecessors, (1248), 56 states have return successors, (1248), 1218 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-12-19 07:51:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7471 states to 7471 states and 12352 transitions. [2023-12-19 07:51:22,480 INFO L78 Accepts]: Start accepts. Automaton has 7471 states and 12352 transitions. Word has length 569 [2023-12-19 07:51:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:22,481 INFO L495 AbstractCegarLoop]: Abstraction has 7471 states and 12352 transitions. [2023-12-19 07:51:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7471 states and 12352 transitions. [2023-12-19 07:51:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2023-12-19 07:51:22,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:22,497 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:22,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:22,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 07:51:22,708 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:22,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash -814239688, now seen corresponding path program 1 times [2023-12-19 07:51:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:22,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45608343] [2023-12-19 07:51:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:22,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:22,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933870572] [2023-12-19 07:51:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:22,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:22,771 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:22,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 07:51:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:23,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 07:51:23,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:24,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:51:24,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:24,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45608343] [2023-12-19 07:51:24,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:24,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933870572] [2023-12-19 07:51:24,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933870572] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:51:24,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:51:24,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 07:51:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414817366] [2023-12-19 07:51:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:24,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 07:51:24,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 07:51:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:24,099 INFO L87 Difference]: Start difference. First operand 7471 states and 12352 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:25,314 INFO L93 Difference]: Finished difference Result 17158 states and 28048 transitions. [2023-12-19 07:51:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 07:51:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 569 [2023-12-19 07:51:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:25,342 INFO L225 Difference]: With dead ends: 17158 [2023-12-19 07:51:25,343 INFO L226 Difference]: Without dead ends: 9688 [2023-12-19 07:51:25,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-19 07:51:25,360 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 857 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:25,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1227 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 07:51:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9688 states. [2023-12-19 07:51:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9688 to 9327. [2023-12-19 07:51:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 7287 states have (on average 1.5327295183202965) internal successors, (11169), 7334 states have internal predecessors, (11169), 1949 states have call successors, (1949), 90 states have call predecessors, (1949), 90 states have return successors, (1949), 1902 states have call predecessors, (1949), 1949 states have call successors, (1949) [2023-12-19 07:51:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 15067 transitions. [2023-12-19 07:51:26,126 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 15067 transitions. Word has length 569 [2023-12-19 07:51:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:26,127 INFO L495 AbstractCegarLoop]: Abstraction has 9327 states and 15067 transitions. [2023-12-19 07:51:26,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:51:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 15067 transitions. [2023-12-19 07:51:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2023-12-19 07:51:26,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:26,135 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:26,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:26,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 07:51:26,344 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:26,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1108988346, now seen corresponding path program 1 times [2023-12-19 07:51:26,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:26,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579342514] [2023-12-19 07:51:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:26,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:26,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:26,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436968116] [2023-12-19 07:51:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:26,393 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:26,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 07:51:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:26,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:51:26,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 3149 proven. 30 refuted. 0 times theorem prover too weak. 10765 trivial. 0 not checked. [2023-12-19 07:51:27,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:51:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 219 proven. 30 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:51:27,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579342514] [2023-12-19 07:51:27,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436968116] [2023-12-19 07:51:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436968116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:51:27,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:51:27,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 07:51:27,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303155208] [2023-12-19 07:51:27,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:51:27,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 07:51:27,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 07:51:27,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 07:51:27,372 INFO L87 Difference]: Start difference. First operand 9327 states and 15067 transitions. Second operand has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-12-19 07:51:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:28,488 INFO L93 Difference]: Finished difference Result 18701 states and 30130 transitions. [2023-12-19 07:51:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:51:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 569 [2023-12-19 07:51:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:28,516 INFO L225 Difference]: With dead ends: 18701 [2023-12-19 07:51:28,516 INFO L226 Difference]: Without dead ends: 9473 [2023-12-19 07:51:28,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1140 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 07:51:28,536 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 330 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:28,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 977 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 07:51:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9473 states. [2023-12-19 07:51:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9473 to 9343. [2023-12-19 07:51:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9343 states, 7299 states have (on average 1.518701191944102) internal successors, (11085), 7346 states have internal predecessors, (11085), 1949 states have call successors, (1949), 94 states have call predecessors, (1949), 94 states have return successors, (1949), 1902 states have call predecessors, (1949), 1949 states have call successors, (1949) [2023-12-19 07:51:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9343 states to 9343 states and 14983 transitions. [2023-12-19 07:51:29,608 INFO L78 Accepts]: Start accepts. Automaton has 9343 states and 14983 transitions. Word has length 569 [2023-12-19 07:51:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:29,609 INFO L495 AbstractCegarLoop]: Abstraction has 9343 states and 14983 transitions. [2023-12-19 07:51:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-12-19 07:51:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9343 states and 14983 transitions. [2023-12-19 07:51:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-12-19 07:51:29,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:29,628 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:29,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 07:51:29,836 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:29,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash 135412696, now seen corresponding path program 1 times [2023-12-19 07:51:29,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:29,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578008203] [2023-12-19 07:51:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:29,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:29,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:29,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610104608] [2023-12-19 07:51:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:29,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:29,914 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:29,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 07:51:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:30,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 07:51:30,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 4505 proven. 48 refuted. 0 times theorem prover too weak. 9391 trivial. 0 not checked. [2023-12-19 07:51:30,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:51:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 201 proven. 48 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:51:30,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:30,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578008203] [2023-12-19 07:51:30,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:30,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610104608] [2023-12-19 07:51:30,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610104608] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:51:30,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:51:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 07:51:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098656116] [2023-12-19 07:51:30,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:51:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 07:51:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 07:51:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 07:51:30,903 INFO L87 Difference]: Start difference. First operand 9343 states and 14983 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-12-19 07:51:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:32,234 INFO L93 Difference]: Finished difference Result 18733 states and 29962 transitions. [2023-12-19 07:51:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 07:51:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 570 [2023-12-19 07:51:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:32,263 INFO L225 Difference]: With dead ends: 18733 [2023-12-19 07:51:32,263 INFO L226 Difference]: Without dead ends: 9489 [2023-12-19 07:51:32,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 07:51:32,287 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 807 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:32,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 969 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 07:51:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2023-12-19 07:51:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 9359. [2023-12-19 07:51:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9359 states, 7311 states have (on average 1.5047189167008617) internal successors, (11001), 7358 states have internal predecessors, (11001), 1949 states have call successors, (1949), 98 states have call predecessors, (1949), 98 states have return successors, (1949), 1902 states have call predecessors, (1949), 1949 states have call successors, (1949) [2023-12-19 07:51:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9359 states to 9359 states and 14899 transitions. [2023-12-19 07:51:33,239 INFO L78 Accepts]: Start accepts. Automaton has 9359 states and 14899 transitions. Word has length 570 [2023-12-19 07:51:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:33,240 INFO L495 AbstractCegarLoop]: Abstraction has 9359 states and 14899 transitions. [2023-12-19 07:51:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-12-19 07:51:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9359 states and 14899 transitions. [2023-12-19 07:51:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-12-19 07:51:33,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:33,251 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:33,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:33,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:33,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1913975146, now seen corresponding path program 1 times [2023-12-19 07:51:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737376848] [2023-12-19 07:51:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:33,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:33,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045575502] [2023-12-19 07:51:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:33,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:33,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:33,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 07:51:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:34,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 07:51:34,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 4505 proven. 48 refuted. 0 times theorem prover too weak. 9391 trivial. 0 not checked. [2023-12-19 07:51:34,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:51:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 201 proven. 48 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:51:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737376848] [2023-12-19 07:51:34,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045575502] [2023-12-19 07:51:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045575502] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:51:34,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:51:34,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-19 07:51:34,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598518921] [2023-12-19 07:51:34,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:51:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 07:51:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 07:51:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 07:51:34,709 INFO L87 Difference]: Start difference. First operand 9359 states and 14899 transitions. Second operand has 10 states, 10 states have (on average 22.6) internal successors, (226), 10 states have internal predecessors, (226), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-12-19 07:51:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:36,154 INFO L93 Difference]: Finished difference Result 18749 states and 29782 transitions. [2023-12-19 07:51:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 07:51:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.6) internal successors, (226), 10 states have internal predecessors, (226), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 570 [2023-12-19 07:51:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:36,200 INFO L225 Difference]: With dead ends: 18749 [2023-12-19 07:51:36,200 INFO L226 Difference]: Without dead ends: 9489 [2023-12-19 07:51:36,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1143 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-12-19 07:51:36,229 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 566 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:36,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1330 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 07:51:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2023-12-19 07:51:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 9359. [2023-12-19 07:51:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9359 states, 7311 states have (on average 1.4959649842702776) internal successors, (10937), 7358 states have internal predecessors, (10937), 1949 states have call successors, (1949), 98 states have call predecessors, (1949), 98 states have return successors, (1949), 1902 states have call predecessors, (1949), 1949 states have call successors, (1949) [2023-12-19 07:51:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9359 states to 9359 states and 14835 transitions. [2023-12-19 07:51:37,369 INFO L78 Accepts]: Start accepts. Automaton has 9359 states and 14835 transitions. Word has length 570 [2023-12-19 07:51:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:51:37,370 INFO L495 AbstractCegarLoop]: Abstraction has 9359 states and 14835 transitions. [2023-12-19 07:51:37,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.6) internal successors, (226), 10 states have internal predecessors, (226), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-12-19 07:51:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 9359 states and 14835 transitions. [2023-12-19 07:51:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-12-19 07:51:37,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:51:37,393 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:51:37,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 07:51:37,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:37,605 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:51:37,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:51:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1831761353, now seen corresponding path program 1 times [2023-12-19 07:51:37,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:51:37,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412686961] [2023-12-19 07:51:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:37,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:51:37,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:51:37,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258929744] [2023-12-19 07:51:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:51:37,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:51:37,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:51:37,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:51:37,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 07:51:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:51:38,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-19 07:51:38,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:51:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 7808 proven. 225 refuted. 0 times theorem prover too weak. 5911 trivial. 0 not checked. [2023-12-19 07:51:40,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:51:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:51:41,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:51:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412686961] [2023-12-19 07:51:41,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:51:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258929744] [2023-12-19 07:51:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258929744] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 07:51:41,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 07:51:41,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 29 [2023-12-19 07:51:41,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778294427] [2023-12-19 07:51:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:51:41,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 07:51:41,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:51:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 07:51:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2023-12-19 07:51:41,965 INFO L87 Difference]: Start difference. First operand 9359 states and 14835 transitions. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 3 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 3 states have call predecessors, (84), 3 states have call successors, (84) [2023-12-19 07:51:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:51:55,709 INFO L93 Difference]: Finished difference Result 96131 states and 151861 transitions. [2023-12-19 07:51:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 07:51:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 3 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 3 states have call predecessors, (84), 3 states have call successors, (84) Word has length 571 [2023-12-19 07:51:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:51:55,930 INFO L225 Difference]: With dead ends: 96131 [2023-12-19 07:51:55,930 INFO L226 Difference]: Without dead ends: 86871 [2023-12-19 07:51:55,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 1121 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1283, Unknown=0, NotChecked=0, Total=1722 [2023-12-19 07:51:55,966 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 7337 mSDsluCounter, 5160 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 3031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7337 SdHoareTripleChecker+Valid, 6112 SdHoareTripleChecker+Invalid, 5484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3031 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-19 07:51:55,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7337 Valid, 6112 Invalid, 5484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3031 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-19 07:51:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86871 states. [2023-12-19 07:52:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86871 to 43439. [2023-12-19 07:52:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43439 states, 35546 states have (on average 1.5457154110167108) internal successors, (54944), 35747 states have internal predecessors, (54944), 7555 states have call successors, (7555), 337 states have call predecessors, (7555), 337 states have return successors, (7555), 7354 states have call predecessors, (7555), 7555 states have call successors, (7555) [2023-12-19 07:52:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43439 states to 43439 states and 70054 transitions. [2023-12-19 07:52:02,287 INFO L78 Accepts]: Start accepts. Automaton has 43439 states and 70054 transitions. Word has length 571 [2023-12-19 07:52:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:52:02,288 INFO L495 AbstractCegarLoop]: Abstraction has 43439 states and 70054 transitions. [2023-12-19 07:52:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 3 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 3 states have call predecessors, (84), 3 states have call successors, (84) [2023-12-19 07:52:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43439 states and 70054 transitions. [2023-12-19 07:52:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-12-19 07:52:02,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:52:02,319 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:52:02,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 07:52:02,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:52:02,529 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:52:02,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:52:02,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1619200441, now seen corresponding path program 1 times [2023-12-19 07:52:02,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:52:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133607347] [2023-12-19 07:52:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:52:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:52:02,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:52:02,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103300104] [2023-12-19 07:52:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:52:02,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:52:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:52:02,584 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:52:02,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 07:52:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:52:03,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 07:52:03,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:52:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 4505 proven. 48 refuted. 0 times theorem prover too weak. 9391 trivial. 0 not checked. [2023-12-19 07:52:03,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:52:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 201 proven. 48 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:52:03,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:52:03,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133607347] [2023-12-19 07:52:03,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:52:03,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103300104] [2023-12-19 07:52:03,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103300104] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:52:03,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:52:03,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-19 07:52:03,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58894900] [2023-12-19 07:52:03,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:52:03,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 07:52:03,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:52:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 07:52:03,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-19 07:52:03,818 INFO L87 Difference]: Start difference. First operand 43439 states and 70054 transitions. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-12-19 07:52:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:52:15,586 INFO L93 Difference]: Finished difference Result 126571 states and 201345 transitions. [2023-12-19 07:52:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 07:52:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 571 [2023-12-19 07:52:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:52:15,795 INFO L225 Difference]: With dead ends: 126571 [2023-12-19 07:52:15,795 INFO L226 Difference]: Without dead ends: 83235 [2023-12-19 07:52:15,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 1131 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=895, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 07:52:15,859 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 1928 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 1533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1995 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1533 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-19 07:52:15,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1995 Valid, 2368 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1533 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-19 07:52:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83235 states. [2023-12-19 07:52:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83235 to 45671. [2023-12-19 07:52:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45671 states, 37850 states have (on average 1.5450462351387053) internal successors, (58480), 38051 states have internal predecessors, (58480), 7487 states have call successors, (7487), 333 states have call predecessors, (7487), 333 states have return successors, (7487), 7286 states have call predecessors, (7487), 7487 states have call successors, (7487) [2023-12-19 07:52:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45671 states to 45671 states and 73454 transitions. [2023-12-19 07:52:21,614 INFO L78 Accepts]: Start accepts. Automaton has 45671 states and 73454 transitions. Word has length 571 [2023-12-19 07:52:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:52:21,615 INFO L495 AbstractCegarLoop]: Abstraction has 45671 states and 73454 transitions. [2023-12-19 07:52:21,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-12-19 07:52:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 45671 states and 73454 transitions. [2023-12-19 07:52:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-12-19 07:52:21,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:52:21,698 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:52:21,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 07:52:21,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:52:21,908 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:52:21,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:52:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash 595903341, now seen corresponding path program 1 times [2023-12-19 07:52:21,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:52:21,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080547172] [2023-12-19 07:52:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:52:21,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:52:21,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:52:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559650112] [2023-12-19 07:52:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:52:21,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:52:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:52:21,970 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:52:21,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 07:52:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:52:22,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 07:52:22,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:52:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13944 trivial. 0 not checked. [2023-12-19 07:52:23,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 07:52:23,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:52:23,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080547172] [2023-12-19 07:52:23,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:52:23,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559650112] [2023-12-19 07:52:23,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559650112] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 07:52:23,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 07:52:23,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 07:52:23,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311266228] [2023-12-19 07:52:23,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 07:52:23,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 07:52:23,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:52:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 07:52:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-19 07:52:23,059 INFO L87 Difference]: Start difference. First operand 45671 states and 73454 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:52:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:52:30,175 INFO L93 Difference]: Finished difference Result 111785 states and 179309 transitions. [2023-12-19 07:52:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 07:52:30,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) Word has length 572 [2023-12-19 07:52:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:52:30,315 INFO L225 Difference]: With dead ends: 111785 [2023-12-19 07:52:30,315 INFO L226 Difference]: Without dead ends: 66217 [2023-12-19 07:52:30,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-19 07:52:30,372 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 1036 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 07:52:30,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1646 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 07:52:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66217 states. [2023-12-19 07:52:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66217 to 63673. [2023-12-19 07:52:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63673 states, 52276 states have (on average 1.5330170632795164) internal successors, (80140), 52571 states have internal predecessors, (80140), 10911 states have call successors, (10911), 485 states have call predecessors, (10911), 485 states have return successors, (10911), 10616 states have call predecessors, (10911), 10911 states have call successors, (10911) [2023-12-19 07:52:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63673 states to 63673 states and 101962 transitions. [2023-12-19 07:52:37,202 INFO L78 Accepts]: Start accepts. Automaton has 63673 states and 101962 transitions. Word has length 572 [2023-12-19 07:52:37,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:52:37,203 INFO L495 AbstractCegarLoop]: Abstraction has 63673 states and 101962 transitions. [2023-12-19 07:52:37,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (84), 1 states have call predecessors, (84), 1 states have return successors, (84), 1 states have call predecessors, (84), 1 states have call successors, (84) [2023-12-19 07:52:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 63673 states and 101962 transitions. [2023-12-19 07:52:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2023-12-19 07:52:37,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:52:37,239 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:52:37,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-19 07:52:37,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:52:37,449 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:52:37,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:52:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1133562390, now seen corresponding path program 1 times [2023-12-19 07:52:37,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:52:37,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594335128] [2023-12-19 07:52:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:52:37,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:52:37,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:52:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251504537] [2023-12-19 07:52:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:52:37,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:52:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:52:37,524 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:52:37,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 07:52:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:52:38,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 07:52:38,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:52:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 7097 proven. 246 refuted. 0 times theorem prover too weak. 6601 trivial. 0 not checked. [2023-12-19 07:52:39,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:52:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 123 proven. 126 refuted. 0 times theorem prover too weak. 13695 trivial. 0 not checked. [2023-12-19 07:52:40,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:52:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594335128] [2023-12-19 07:52:40,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:52:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251504537] [2023-12-19 07:52:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251504537] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 07:52:40,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 07:52:40,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2023-12-19 07:52:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975265457] [2023-12-19 07:52:40,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 07:52:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 07:52:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:52:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 07:52:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2023-12-19 07:52:40,054 INFO L87 Difference]: Start difference. First operand 63673 states and 101962 transitions. Second operand has 18 states, 18 states have (on average 15.61111111111111) internal successors, (281), 17 states have internal predecessors, (281), 5 states have call successors, (168), 4 states have call predecessors, (168), 6 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-12-19 07:52:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:52:57,870 INFO L93 Difference]: Finished difference Result 199741 states and 321180 transitions. [2023-12-19 07:52:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 07:52:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.61111111111111) internal successors, (281), 17 states have internal predecessors, (281), 5 states have call successors, (168), 4 states have call predecessors, (168), 6 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) Word has length 573 [2023-12-19 07:52:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:52:58,360 INFO L225 Difference]: With dead ends: 199741 [2023-12-19 07:52:58,361 INFO L226 Difference]: Without dead ends: 136171 [2023-12-19 07:52:58,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 1134 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=516, Invalid=1124, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 07:52:58,459 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 5450 mSDsluCounter, 3646 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 1852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5534 SdHoareTripleChecker+Valid, 3993 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1852 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-19 07:52:58,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5534 Valid, 3993 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1852 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-19 07:52:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136171 states. [2023-12-19 07:53:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136171 to 108277. [2023-12-19 07:53:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108277 states, 89144 states have (on average 1.5281342546890424) internal successors, (136224), 89639 states have internal predecessors, (136224), 18287 states have call successors, (18287), 845 states have call predecessors, (18287), 845 states have return successors, (18287), 17792 states have call predecessors, (18287), 18287 states have call successors, (18287) [2023-12-19 07:53:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108277 states to 108277 states and 172798 transitions. [2023-12-19 07:53:11,168 INFO L78 Accepts]: Start accepts. Automaton has 108277 states and 172798 transitions. Word has length 573 [2023-12-19 07:53:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 07:53:11,169 INFO L495 AbstractCegarLoop]: Abstraction has 108277 states and 172798 transitions. [2023-12-19 07:53:11,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.61111111111111) internal successors, (281), 17 states have internal predecessors, (281), 5 states have call successors, (168), 4 states have call predecessors, (168), 6 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-12-19 07:53:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 108277 states and 172798 transitions. [2023-12-19 07:53:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2023-12-19 07:53:11,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 07:53:11,203 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 07:53:11,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 07:53:11,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:53:11,415 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 07:53:11,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 07:53:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1112017064, now seen corresponding path program 1 times [2023-12-19 07:53:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 07:53:11,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036664021] [2023-12-19 07:53:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:53:11,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 07:53:11,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 07:53:11,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801338710] [2023-12-19 07:53:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 07:53:11,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 07:53:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 07:53:11,827 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 07:53:11,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 07:53:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 07:53:12,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-19 07:53:12,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 07:53:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 9225 proven. 579 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-12-19 07:53:18,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 07:53:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 07:53:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036664021] [2023-12-19 07:53:37,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 07:53:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801338710] [2023-12-19 07:53:37,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801338710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 07:53:37,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 07:53:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-12-19 07:53:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006107597] [2023-12-19 07:53:37,182 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 07:53:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 07:53:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 07:53:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 07:53:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1735, Unknown=3, NotChecked=0, Total=2070 [2023-12-19 07:53:37,185 INFO L87 Difference]: Start difference. First operand 108277 states and 172798 transitions. Second operand has 32 states, 32 states have (on average 6.0) internal successors, (192), 30 states have internal predecessors, (192), 8 states have call successors, (84), 8 states have call predecessors, (84), 13 states have return successors, (84), 8 states have call predecessors, (84), 8 states have call successors, (84) [2023-12-19 07:56:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 07:56:44,798 INFO L93 Difference]: Finished difference Result 533021 states and 829636 transitions. [2023-12-19 07:56:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-12-19 07:56:44,799 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.0) internal successors, (192), 30 states have internal predecessors, (192), 8 states have call successors, (84), 8 states have call predecessors, (84), 13 states have return successors, (84), 8 states have call predecessors, (84), 8 states have call successors, (84) Word has length 573 [2023-12-19 07:56:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 07:56:47,238 INFO L225 Difference]: With dead ends: 533021 [2023-12-19 07:56:47,238 INFO L226 Difference]: Without dead ends: 424855 [2023-12-19 07:56:47,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8647 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=4550, Invalid=20564, Unknown=8, NotChecked=0, Total=25122 [2023-12-19 07:56:47,542 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 6056 mSDsluCounter, 3801 mSDsCounter, 0 mSdLazyCounter, 5403 mSolverCounterSat, 2351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6174 SdHoareTripleChecker+Valid, 4233 SdHoareTripleChecker+Invalid, 7754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2351 IncrementalHoareTripleChecker+Valid, 5403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-12-19 07:56:47,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6174 Valid, 4233 Invalid, 7754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2351 Valid, 5403 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2023-12-19 07:56:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424855 states.