/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-92.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:23:26,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:23:26,692 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 21:23:26,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:23:26,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:23:26,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:23:26,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:23:26,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:23:26,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:23:26,727 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:23:26,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:23:26,727 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:23:26,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:23:26,729 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:23:26,729 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:23:26,729 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:23:26,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:23:26,730 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:23:26,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:23:26,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:23:26,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:23:26,731 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:23:26,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:23:26,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:23:26,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:23:26,731 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:23:26,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:23:26,732 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:23:26,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:23:26,732 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:23:26,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:23:26,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:23:26,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:23:26,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:23:26,734 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:23:26,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:23:26,735 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:23:26,735 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:23:26,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:23:26,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:23:26,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:23:26,953 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:23:26,954 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:23:26,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-92.i [2023-12-15 21:23:28,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:23:28,265 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:23:28,265 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-92.i [2023-12-15 21:23:28,284 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ef3e90f/476de2fc5b8d4a80a7d0d78dd399695c/FLAG8e1448c77 [2023-12-15 21:23:28,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ef3e90f/476de2fc5b8d4a80a7d0d78dd399695c [2023-12-15 21:23:28,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:23:28,297 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:23:28,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:23:28,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:23:28,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:23:28,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f627a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28, skipping insertion in model container [2023-12-15 21:23:28,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,382 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:23:28,481 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-92.i[916,929] [2023-12-15 21:23:28,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:23:28,639 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:23:28,647 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-92.i[916,929] [2023-12-15 21:23:28,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:23:28,754 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:23:28,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28 WrapperNode [2023-12-15 21:23:28,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:23:28,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:23:28,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:23:28,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:23:28,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,788 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,857 INFO L138 Inliner]: procedures = 26, calls = 81, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 602 [2023-12-15 21:23:28,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:23:28,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:23:28,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:23:28,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:23:28,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,933 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 21:23:28,934 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,934 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,969 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,979 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:23:28,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:23:28,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:23:28,979 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:23:28,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (1/1) ... [2023-12-15 21:23:28,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:23:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:29,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 21:23:29,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 21:23:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:23:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 21:23:29,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 21:23:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:23:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:23:29,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:23:29,121 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:23:29,122 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:23:29,741 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:23:29,793 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:23:29,794 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 21:23:29,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:23:29 BoogieIcfgContainer [2023-12-15 21:23:29,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:23:29,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:23:29,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:23:29,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:23:29,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:23:28" (1/3) ... [2023-12-15 21:23:29,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27610e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:23:29, skipping insertion in model container [2023-12-15 21:23:29,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:28" (2/3) ... [2023-12-15 21:23:29,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27610e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:23:29, skipping insertion in model container [2023-12-15 21:23:29,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:23:29" (3/3) ... [2023-12-15 21:23:29,801 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-92.i [2023-12-15 21:23:29,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:23:29,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:23:29,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:23:29,860 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;@447f5eb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:23:29,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:23:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 235 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 165 states have internal predecessors, (256), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-15 21:23:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-12-15 21:23:29,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:29,902 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:29,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:29,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash -565475387, now seen corresponding path program 1 times [2023-12-15 21:23:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738133209] [2023-12-15 21:23:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:30,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738133209] [2023-12-15 21:23:30,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 21:23:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835207338] [2023-12-15 21:23:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:30,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:30,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:30,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 21:23:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:30,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 21:23:30,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2023-12-15 21:23:30,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:30,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835207338] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:30,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:30,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 21:23:30,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094864710] [2023-12-15 21:23:30,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:30,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 21:23:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 21:23:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:23:30,806 INFO L87 Difference]: Start difference. First operand has 235 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 165 states have internal predecessors, (256), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-12-15 21:23:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:30,889 INFO L93 Difference]: Finished difference Result 467 states and 850 transitions. [2023-12-15 21:23:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 21:23:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) Word has length 462 [2023-12-15 21:23:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:30,903 INFO L225 Difference]: With dead ends: 467 [2023-12-15 21:23:30,903 INFO L226 Difference]: Without dead ends: 233 [2023-12-15 21:23:30,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:23:30,914 INFO L413 NwaCegarLoop]: 382 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, 382 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:30,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 382 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-12-15 21:23:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2023-12-15 21:23:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 163 states have (on average 1.5276073619631902) internal successors, (249), 163 states have internal predecessors, (249), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-15 21:23:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 385 transitions. [2023-12-15 21:23:31,023 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 385 transitions. Word has length 462 [2023-12-15 21:23:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:31,024 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 385 transitions. [2023-12-15 21:23:31,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-12-15 21:23:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 385 transitions. [2023-12-15 21:23:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-12-15 21:23:31,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:31,033 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:31,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:31,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-15 21:23:31,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:31,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash 880450641, now seen corresponding path program 1 times [2023-12-15 21:23:31,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:31,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353410092] [2023-12-15 21:23:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:31,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:31,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:31,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322141523] [2023-12-15 21:23:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:31,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:31,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:31,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:31,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 21:23:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:31,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 21:23:31,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:32,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353410092] [2023-12-15 21:23:32,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322141523] [2023-12-15 21:23:32,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322141523] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:32,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:32,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141609128] [2023-12-15 21:23:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:32,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:23:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:23:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:32,270 INFO L87 Difference]: Start difference. First operand 233 states and 385 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:32,516 INFO L93 Difference]: Finished difference Result 810 states and 1345 transitions. [2023-12-15 21:23:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:23:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 462 [2023-12-15 21:23:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:32,521 INFO L225 Difference]: With dead ends: 810 [2023-12-15 21:23:32,522 INFO L226 Difference]: Without dead ends: 578 [2023-12-15 21:23:32,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:32,524 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 695 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:32,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 1515 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-12-15 21:23:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 462. [2023-12-15 21:23:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 323 states have (on average 1.5263157894736843) internal successors, (493), 323 states have internal predecessors, (493), 136 states have call successors, (136), 2 states have call predecessors, (136), 2 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2023-12-15 21:23:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 765 transitions. [2023-12-15 21:23:32,583 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 765 transitions. Word has length 462 [2023-12-15 21:23:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:32,584 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 765 transitions. [2023-12-15 21:23:32,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 765 transitions. [2023-12-15 21:23:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-12-15 21:23:32,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:32,588 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:32,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-15 21:23:32,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:32,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:32,799 INFO L85 PathProgramCache]: Analyzing trace with hash -948712493, now seen corresponding path program 1 times [2023-12-15 21:23:32,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:32,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227550054] [2023-12-15 21:23:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:32,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:32,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820614225] [2023-12-15 21:23:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:32,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:32,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:32,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 21:23:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:33,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:33,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:33,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:33,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:33,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227550054] [2023-12-15 21:23:33,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:33,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820614225] [2023-12-15 21:23:33,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820614225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:33,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:33,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:33,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275659886] [2023-12-15 21:23:33,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:33,179 INFO L87 Difference]: Start difference. First operand 462 states and 765 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:33,250 INFO L93 Difference]: Finished difference Result 1154 states and 1915 transitions. [2023-12-15 21:23:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 462 [2023-12-15 21:23:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:33,254 INFO L225 Difference]: With dead ends: 1154 [2023-12-15 21:23:33,255 INFO L226 Difference]: Without dead ends: 693 [2023-12-15 21:23:33,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:33,257 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 189 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:33,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 730 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-12-15 21:23:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 689. [2023-12-15 21:23:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 540 states have (on average 1.5777777777777777) internal successors, (852), 542 states have internal predecessors, (852), 144 states have call successors, (144), 4 states have call predecessors, (144), 4 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2023-12-15 21:23:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1140 transitions. [2023-12-15 21:23:33,305 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1140 transitions. Word has length 462 [2023-12-15 21:23:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:33,306 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 1140 transitions. [2023-12-15 21:23:33,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1140 transitions. [2023-12-15 21:23:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-12-15 21:23:33,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:33,309 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:33,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 21:23:33,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:33,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:33,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 644371723, now seen corresponding path program 1 times [2023-12-15 21:23:33,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:33,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794124492] [2023-12-15 21:23:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:33,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:33,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:33,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740614145] [2023-12-15 21:23:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:33,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:33,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:33,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:33,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 21:23:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:33,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:33,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:33,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:33,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:33,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794124492] [2023-12-15 21:23:33,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:33,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740614145] [2023-12-15 21:23:33,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740614145] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:33,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:33,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:33,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006259180] [2023-12-15 21:23:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:33,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:33,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:33,922 INFO L87 Difference]: Start difference. First operand 689 states and 1140 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:33,984 INFO L93 Difference]: Finished difference Result 2029 states and 3354 transitions. [2023-12-15 21:23:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-12-15 21:23:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:33,992 INFO L225 Difference]: With dead ends: 2029 [2023-12-15 21:23:33,992 INFO L226 Difference]: Without dead ends: 1341 [2023-12-15 21:23:33,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:33,994 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 349 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:33,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 854 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2023-12-15 21:23:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 799. [2023-12-15 21:23:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 650 states have (on average 1.593846153846154) internal successors, (1036), 652 states have internal predecessors, (1036), 144 states have call successors, (144), 4 states have call predecessors, (144), 4 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2023-12-15 21:23:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1324 transitions. [2023-12-15 21:23:34,077 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1324 transitions. Word has length 463 [2023-12-15 21:23:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:34,078 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1324 transitions. [2023-12-15 21:23:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1324 transitions. [2023-12-15 21:23:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-12-15 21:23:34,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:34,082 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:34,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:34,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:34,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1205071501, now seen corresponding path program 1 times [2023-12-15 21:23:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63296821] [2023-12-15 21:23:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:34,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:34,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924721541] [2023-12-15 21:23:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:34,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 21:23:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:34,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:34,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:35,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63296821] [2023-12-15 21:23:35,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924721541] [2023-12-15 21:23:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924721541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:35,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:35,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:35,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121237031] [2023-12-15 21:23:35,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:35,507 INFO L87 Difference]: Start difference. First operand 799 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:35,553 INFO L93 Difference]: Finished difference Result 1776 states and 2931 transitions. [2023-12-15 21:23:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:35,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-12-15 21:23:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:35,557 INFO L225 Difference]: With dead ends: 1776 [2023-12-15 21:23:35,557 INFO L226 Difference]: Without dead ends: 978 [2023-12-15 21:23:35,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:35,559 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 18 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:35,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2023-12-15 21:23:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 978. [2023-12-15 21:23:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 759 states have (on average 1.5546772068511199) internal successors, (1180), 761 states have internal predecessors, (1180), 212 states have call successors, (212), 6 states have call predecessors, (212), 6 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-12-15 21:23:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1604 transitions. [2023-12-15 21:23:35,616 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1604 transitions. Word has length 463 [2023-12-15 21:23:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:35,617 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 1604 transitions. [2023-12-15 21:23:35,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1604 transitions. [2023-12-15 21:23:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-12-15 21:23:35,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:35,620 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:35,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:35,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:35,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:35,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 525799247, now seen corresponding path program 1 times [2023-12-15 21:23:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:35,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661630381] [2023-12-15 21:23:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:35,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:35,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958883423] [2023-12-15 21:23:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:35,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:35,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:35,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 21:23:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:36,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:36,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 1083 proven. 189 refuted. 0 times theorem prover too weak. 7840 trivial. 0 not checked. [2023-12-15 21:23:36,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-12-15 21:23:36,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:36,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661630381] [2023-12-15 21:23:36,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:36,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958883423] [2023-12-15 21:23:36,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958883423] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:36,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:36,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:36,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660239821] [2023-12-15 21:23:36,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:36,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:36,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:36,964 INFO L87 Difference]: Start difference. First operand 978 states and 1604 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-12-15 21:23:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:37,335 INFO L93 Difference]: Finished difference Result 1512 states and 2474 transitions. [2023-12-15 21:23:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) Word has length 463 [2023-12-15 21:23:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:37,339 INFO L225 Difference]: With dead ends: 1512 [2023-12-15 21:23:37,339 INFO L226 Difference]: Without dead ends: 692 [2023-12-15 21:23:37,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:37,341 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 392 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:37,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 755 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2023-12-15 21:23:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 684. [2023-12-15 21:23:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 472 states have (on average 1.4639830508474576) internal successors, (691), 472 states have internal predecessors, (691), 204 states have call successors, (204), 7 states have call predecessors, (204), 7 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1099 transitions. [2023-12-15 21:23:37,379 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1099 transitions. Word has length 463 [2023-12-15 21:23:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:37,380 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 1099 transitions. [2023-12-15 21:23:37,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-12-15 21:23:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1099 transitions. [2023-12-15 21:23:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-12-15 21:23:37,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:37,383 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:37,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:37,590 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:37,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -450217907, now seen corresponding path program 1 times [2023-12-15 21:23:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:37,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116157549] [2023-12-15 21:23:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:37,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:37,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488110541] [2023-12-15 21:23:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:37,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:37,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:37,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 21:23:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:37,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:37,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:38,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:38,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116157549] [2023-12-15 21:23:38,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:38,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488110541] [2023-12-15 21:23:38,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488110541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:38,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:38,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:38,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962944058] [2023-12-15 21:23:38,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:38,011 INFO L87 Difference]: Start difference. First operand 684 states and 1099 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:38,087 INFO L93 Difference]: Finished difference Result 1604 states and 2587 transitions. [2023-12-15 21:23:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:38,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-12-15 21:23:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:38,092 INFO L225 Difference]: With dead ends: 1604 [2023-12-15 21:23:38,092 INFO L226 Difference]: Without dead ends: 1082 [2023-12-15 21:23:38,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:38,094 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 294 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:38,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 764 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2023-12-15 21:23:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 768. [2023-12-15 21:23:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 556 states have (on average 1.4946043165467626) internal successors, (831), 556 states have internal predecessors, (831), 204 states have call successors, (204), 7 states have call predecessors, (204), 7 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1239 transitions. [2023-12-15 21:23:38,189 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1239 transitions. Word has length 463 [2023-12-15 21:23:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:38,190 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1239 transitions. [2023-12-15 21:23:38,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1239 transitions. [2023-12-15 21:23:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-12-15 21:23:38,194 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:38,194 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:38,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:38,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:38,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:38,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash 163575629, now seen corresponding path program 1 times [2023-12-15 21:23:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:38,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65878704] [2023-12-15 21:23:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:38,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:38,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:38,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502678769] [2023-12-15 21:23:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:38,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:38,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:38,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 21:23:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:38,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 21:23:38,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:38,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:38,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65878704] [2023-12-15 21:23:38,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502678769] [2023-12-15 21:23:38,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502678769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:38,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:38,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:23:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767879130] [2023-12-15 21:23:38,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:38,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:23:38,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:23:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:23:38,938 INFO L87 Difference]: Start difference. First operand 768 states and 1239 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:39,247 INFO L93 Difference]: Finished difference Result 1940 states and 3133 transitions. [2023-12-15 21:23:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:23:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-12-15 21:23:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:39,252 INFO L225 Difference]: With dead ends: 1940 [2023-12-15 21:23:39,253 INFO L226 Difference]: Without dead ends: 1334 [2023-12-15 21:23:39,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:39,255 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 1126 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:39,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1480 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2023-12-15 21:23:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 870. [2023-12-15 21:23:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 656 states have (on average 1.4984756097560976) internal successors, (983), 656 states have internal predecessors, (983), 204 states have call successors, (204), 9 states have call predecessors, (204), 9 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1391 transitions. [2023-12-15 21:23:39,322 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1391 transitions. Word has length 463 [2023-12-15 21:23:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:39,322 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1391 transitions. [2023-12-15 21:23:39,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1391 transitions. [2023-12-15 21:23:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-12-15 21:23:39,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:39,325 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:39,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:39,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-15 21:23:39,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:39,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1819958311, now seen corresponding path program 1 times [2023-12-15 21:23:39,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:39,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828727182] [2023-12-15 21:23:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:39,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:39,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:39,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099903120] [2023-12-15 21:23:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:39,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:39,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:39,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 21:23:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:39,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:23:39,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 1971 proven. 177 refuted. 0 times theorem prover too weak. 6964 trivial. 0 not checked. [2023-12-15 21:23:40,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 24 proven. 177 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-12-15 21:23:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828727182] [2023-12-15 21:23:40,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099903120] [2023-12-15 21:23:40,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099903120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:40,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:40,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-15 21:23:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857025608] [2023-12-15 21:23:40,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:40,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 21:23:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 21:23:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-15 21:23:40,883 INFO L87 Difference]: Start difference. First operand 870 states and 1391 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-12-15 21:23:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:41,288 INFO L93 Difference]: Finished difference Result 1624 states and 2587 transitions. [2023-12-15 21:23:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) Word has length 464 [2023-12-15 21:23:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:41,309 INFO L225 Difference]: With dead ends: 1624 [2023-12-15 21:23:41,309 INFO L226 Difference]: Without dead ends: 894 [2023-12-15 21:23:41,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-12-15 21:23:41,311 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 562 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:41,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1031 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-12-15 21:23:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 882. [2023-12-15 21:23:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 665 states have (on average 1.4857142857142858) internal successors, (988), 665 states have internal predecessors, (988), 204 states have call successors, (204), 12 states have call predecessors, (204), 12 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1396 transitions. [2023-12-15 21:23:41,362 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1396 transitions. Word has length 464 [2023-12-15 21:23:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:41,362 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1396 transitions. [2023-12-15 21:23:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-12-15 21:23:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1396 transitions. [2023-12-15 21:23:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-12-15 21:23:41,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:41,366 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:41,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:41,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:41,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash 91084247, now seen corresponding path program 1 times [2023-12-15 21:23:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:41,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563476953] [2023-12-15 21:23:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:41,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:41,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542526768] [2023-12-15 21:23:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:41,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:41,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:41,620 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:41,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 21:23:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:41,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 21:23:41,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 841 proven. 192 refuted. 0 times theorem prover too weak. 8079 trivial. 0 not checked. [2023-12-15 21:23:43,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563476953] [2023-12-15 21:23:44,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542526768] [2023-12-15 21:23:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542526768] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 21:23:44,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 21:23:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2023-12-15 21:23:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375311581] [2023-12-15 21:23:44,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:23:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:23:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:23:44,792 INFO L87 Difference]: Start difference. First operand 882 states and 1396 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:45,507 INFO L93 Difference]: Finished difference Result 1656 states and 2628 transitions. [2023-12-15 21:23:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:23:45,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 464 [2023-12-15 21:23:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:45,511 INFO L225 Difference]: With dead ends: 1656 [2023-12-15 21:23:45,511 INFO L226 Difference]: Without dead ends: 952 [2023-12-15 21:23:45,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-12-15 21:23:45,513 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 548 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:45,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1816 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:23:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-12-15 21:23:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 948. [2023-12-15 21:23:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 725 states have (on average 1.4896551724137932) internal successors, (1080), 727 states have internal predecessors, (1080), 208 states have call successors, (208), 14 states have call predecessors, (208), 14 states have return successors, (208), 206 states have call predecessors, (208), 208 states have call successors, (208) [2023-12-15 21:23:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1496 transitions. [2023-12-15 21:23:45,611 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1496 transitions. Word has length 464 [2023-12-15 21:23:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:45,611 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1496 transitions. [2023-12-15 21:23:45,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1496 transitions. [2023-12-15 21:23:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-12-15 21:23:45,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:45,615 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:45,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:45,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 21:23:45,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:45,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash -133179945, now seen corresponding path program 1 times [2023-12-15 21:23:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:45,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864001082] [2023-12-15 21:23:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:45,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:45,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:45,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284374861] [2023-12-15 21:23:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:45,871 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:45,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 21:23:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:46,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 21:23:46,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:46,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864001082] [2023-12-15 21:23:46,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284374861] [2023-12-15 21:23:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284374861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:46,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:46,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:46,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812721539] [2023-12-15 21:23:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:23:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:23:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:46,726 INFO L87 Difference]: Start difference. First operand 948 states and 1496 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:47,292 INFO L93 Difference]: Finished difference Result 2302 states and 3652 transitions. [2023-12-15 21:23:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:23:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 464 [2023-12-15 21:23:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:47,298 INFO L225 Difference]: With dead ends: 2302 [2023-12-15 21:23:47,299 INFO L226 Difference]: Without dead ends: 1532 [2023-12-15 21:23:47,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:23:47,301 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 529 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:47,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1342 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:23:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2023-12-15 21:23:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1479. [2023-12-15 21:23:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1112 states have (on average 1.47931654676259) internal successors, (1645), 1114 states have internal predecessors, (1645), 344 states have call successors, (344), 22 states have call predecessors, (344), 22 states have return successors, (344), 342 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-15 21:23:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2333 transitions. [2023-12-15 21:23:47,439 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 2333 transitions. Word has length 464 [2023-12-15 21:23:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:47,439 INFO L495 AbstractCegarLoop]: Abstraction has 1479 states and 2333 transitions. [2023-12-15 21:23:47,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 2333 transitions. [2023-12-15 21:23:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-12-15 21:23:47,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:47,443 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:47,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:47,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 21:23:47,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:47,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 480613591, now seen corresponding path program 1 times [2023-12-15 21:23:47,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:47,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357392282] [2023-12-15 21:23:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:47,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:47,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153242555] [2023-12-15 21:23:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:47,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:47,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:47,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:47,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 21:23:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:48,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 21:23:48,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 841 proven. 192 refuted. 0 times theorem prover too weak. 8079 trivial. 0 not checked. [2023-12-15 21:23:49,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-12-15 21:23:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357392282] [2023-12-15 21:23:49,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153242555] [2023-12-15 21:23:49,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153242555] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:49,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:49,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-15 21:23:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157794645] [2023-12-15 21:23:49,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:49,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 21:23:49,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 21:23:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:23:49,851 INFO L87 Difference]: Start difference. First operand 1479 states and 2333 transitions. Second operand has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-12-15 21:23:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:50,504 INFO L93 Difference]: Finished difference Result 2286 states and 3600 transitions. [2023-12-15 21:23:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 21:23:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 464 [2023-12-15 21:23:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:50,509 INFO L225 Difference]: With dead ends: 2286 [2023-12-15 21:23:50,509 INFO L226 Difference]: Without dead ends: 985 [2023-12-15 21:23:50,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2023-12-15 21:23:50,512 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1168 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:50,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 908 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:23:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-12-15 21:23:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 843. [2023-12-15 21:23:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 623 states have (on average 1.4446227929373996) internal successors, (900), 623 states have internal predecessors, (900), 204 states have call successors, (204), 15 states have call predecessors, (204), 15 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1308 transitions. [2023-12-15 21:23:50,586 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1308 transitions. Word has length 464 [2023-12-15 21:23:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:50,587 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1308 transitions. [2023-12-15 21:23:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-12-15 21:23:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1308 transitions. [2023-12-15 21:23:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-12-15 21:23:50,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:50,590 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:50,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:50,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-15 21:23:50,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash -449046148, now seen corresponding path program 1 times [2023-12-15 21:23:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027518873] [2023-12-15 21:23:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:50,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:50,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131811898] [2023-12-15 21:23:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:50,857 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:50,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 21:23:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:51,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 21:23:51,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:51,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:51,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:51,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027518873] [2023-12-15 21:23:51,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:51,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131811898] [2023-12-15 21:23:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131811898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:51,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:51,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269578558] [2023-12-15 21:23:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:51,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:51,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:51,437 INFO L87 Difference]: Start difference. First operand 843 states and 1308 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:51,574 INFO L93 Difference]: Finished difference Result 2109 states and 3292 transitions. [2023-12-15 21:23:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 466 [2023-12-15 21:23:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:51,581 INFO L225 Difference]: With dead ends: 2109 [2023-12-15 21:23:51,581 INFO L226 Difference]: Without dead ends: 1480 [2023-12-15 21:23:51,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:51,585 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 323 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:51,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 728 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-12-15 21:23:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1078. [2023-12-15 21:23:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 858 states have (on average 1.4883449883449884) internal successors, (1277), 858 states have internal predecessors, (1277), 204 states have call successors, (204), 15 states have call predecessors, (204), 15 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1685 transitions. [2023-12-15 21:23:51,672 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1685 transitions. Word has length 466 [2023-12-15 21:23:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:51,672 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1685 transitions. [2023-12-15 21:23:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1685 transitions. [2023-12-15 21:23:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-12-15 21:23:51,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:51,677 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:51,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:51,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 21:23:51,885 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:51,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1325961214, now seen corresponding path program 1 times [2023-12-15 21:23:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:51,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733558988] [2023-12-15 21:23:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:51,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:51,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:51,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744152719] [2023-12-15 21:23:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:51,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:51,941 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:51,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 21:23:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:52,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 21:23:52,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:52,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:52,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733558988] [2023-12-15 21:23:52,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744152719] [2023-12-15 21:23:52,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744152719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:52,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:52,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598549276] [2023-12-15 21:23:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:52,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:52,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:52,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:52,818 INFO L87 Difference]: Start difference. First operand 1078 states and 1685 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:53,077 INFO L93 Difference]: Finished difference Result 2338 states and 3673 transitions. [2023-12-15 21:23:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:23:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 466 [2023-12-15 21:23:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:53,082 INFO L225 Difference]: With dead ends: 2338 [2023-12-15 21:23:53,082 INFO L226 Difference]: Without dead ends: 1394 [2023-12-15 21:23:53,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:53,084 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 254 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:53,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1097 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-12-15 21:23:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1078. [2023-12-15 21:23:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 858 states have (on average 1.4871794871794872) internal successors, (1276), 858 states have internal predecessors, (1276), 204 states have call successors, (204), 15 states have call predecessors, (204), 15 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-15 21:23:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1684 transitions. [2023-12-15 21:23:53,171 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1684 transitions. Word has length 466 [2023-12-15 21:23:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:53,171 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1684 transitions. [2023-12-15 21:23:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1684 transitions. [2023-12-15 21:23:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-12-15 21:23:53,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:53,174 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:53,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:53,382 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:53,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1402248132, now seen corresponding path program 1 times [2023-12-15 21:23:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:53,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275062612] [2023-12-15 21:23:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:53,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:53,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:53,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028706597] [2023-12-15 21:23:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:53,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:53,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:53,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 21:23:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:53,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 21:23:53,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-12-15 21:23:54,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:54,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:54,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275062612] [2023-12-15 21:23:54,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:54,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028706597] [2023-12-15 21:23:54,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028706597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:54,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:54,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487495332] [2023-12-15 21:23:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:54,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:23:54,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:23:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:54,403 INFO L87 Difference]: Start difference. First operand 1078 states and 1684 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:54,574 INFO L93 Difference]: Finished difference Result 2778 states and 4370 transitions. [2023-12-15 21:23:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:23:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 466 [2023-12-15 21:23:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:54,580 INFO L225 Difference]: With dead ends: 2778 [2023-12-15 21:23:54,580 INFO L226 Difference]: Without dead ends: 1950 [2023-12-15 21:23:54,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:54,584 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 151 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:54,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1428 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:23:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2023-12-15 21:23:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1908. [2023-12-15 21:23:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1542 states have (on average 1.4928664072632944) internal successors, (2302), 1542 states have internal predecessors, (2302), 340 states have call successors, (340), 25 states have call predecessors, (340), 25 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-12-15 21:23:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2982 transitions. [2023-12-15 21:23:54,738 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2982 transitions. Word has length 466 [2023-12-15 21:23:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:54,738 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2982 transitions. [2023-12-15 21:23:54,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-12-15 21:23:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2982 transitions. [2023-12-15 21:23:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-12-15 21:23:54,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:54,741 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:54,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:54,950 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 [2023-12-15 21:23:54,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -539948492, now seen corresponding path program 1 times [2023-12-15 21:23:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141072579] [2023-12-15 21:23:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:54,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:54,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773231122] [2023-12-15 21:23:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:54,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:54,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:55,013 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:55,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 21:23:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:55,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-15 21:23:55,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4342 proven. 192 refuted. 0 times theorem prover too weak. 4578 trivial. 0 not checked. [2023-12-15 21:23:56,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 576 proven. 210 refuted. 0 times theorem prover too weak. 8326 trivial. 0 not checked. [2023-12-15 21:23:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:56,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141072579] [2023-12-15 21:23:56,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773231122] [2023-12-15 21:23:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773231122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:56,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-12-15 21:23:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867214528] [2023-12-15 21:23:56,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-15 21:23:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-15 21:23:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-12-15 21:23:56,757 INFO L87 Difference]: Start difference. First operand 1908 states and 2982 transitions. Second operand has 28 states, 26 states have (on average 7.923076923076923) internal successors, (206), 24 states have internal predecessors, (206), 9 states have call successors, (89), 5 states have call predecessors, (89), 11 states have return successors, (90), 9 states have call predecessors, (90), 9 states have call successors, (90) [2023-12-15 21:23:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:57,641 INFO L93 Difference]: Finished difference Result 3722 states and 5743 transitions. [2023-12-15 21:23:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 21:23:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 7.923076923076923) internal successors, (206), 24 states have internal predecessors, (206), 9 states have call successors, (89), 5 states have call predecessors, (89), 11 states have return successors, (90), 9 states have call predecessors, (90), 9 states have call successors, (90) Word has length 467 [2023-12-15 21:23:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:57,648 INFO L225 Difference]: With dead ends: 3722 [2023-12-15 21:23:57,648 INFO L226 Difference]: Without dead ends: 2028 [2023-12-15 21:23:57,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=709, Invalid=1741, Unknown=0, NotChecked=0, Total=2450 [2023-12-15 21:23:57,652 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 689 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:57,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1140 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:23:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2023-12-15 21:23:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1988. [2023-12-15 21:23:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1602 states have (on average 1.4569288389513109) internal successors, (2334), 1602 states have internal predecessors, (2334), 340 states have call successors, (340), 45 states have call predecessors, (340), 45 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-12-15 21:23:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3014 transitions. [2023-12-15 21:23:57,799 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3014 transitions. Word has length 467 [2023-12-15 21:23:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:57,799 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 3014 transitions. [2023-12-15 21:23:57,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 7.923076923076923) internal successors, (206), 24 states have internal predecessors, (206), 9 states have call successors, (89), 5 states have call predecessors, (89), 11 states have return successors, (90), 9 states have call predecessors, (90), 9 states have call successors, (90) [2023-12-15 21:23:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3014 transitions. [2023-12-15 21:23:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-12-15 21:23:57,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:57,803 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:57,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-15 21:23:58,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-15 21:23:58,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:58,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1246405032, now seen corresponding path program 1 times [2023-12-15 21:23:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:58,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963089302] [2023-12-15 21:23:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:58,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:58,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:58,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820816952] [2023-12-15 21:23:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:58,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:58,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:58,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:23:58,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 21:23:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:58,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-15 21:23:58,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 5761 proven. 291 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2023-12-15 21:23:59,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 264 proven. 135 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2023-12-15 21:24:00,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:00,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963089302] [2023-12-15 21:24:00,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:00,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820816952] [2023-12-15 21:24:00,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820816952] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:00,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:00,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2023-12-15 21:24:00,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513710510] [2023-12-15 21:24:00,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:00,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-15 21:24:00,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-15 21:24:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2023-12-15 21:24:00,329 INFO L87 Difference]: Start difference. First operand 1988 states and 3014 transitions. Second operand has 30 states, 28 states have (on average 7.678571428571429) internal successors, (215), 28 states have internal predecessors, (215), 10 states have call successors, (136), 6 states have call predecessors, (136), 9 states have return successors, (136), 8 states have call predecessors, (136), 10 states have call successors, (136) [2023-12-15 21:24:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:02,889 INFO L93 Difference]: Finished difference Result 7428 states and 11523 transitions. [2023-12-15 21:24:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 21:24:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 7.678571428571429) internal successors, (215), 28 states have internal predecessors, (215), 10 states have call successors, (136), 6 states have call predecessors, (136), 9 states have return successors, (136), 8 states have call predecessors, (136), 10 states have call successors, (136) Word has length 468 [2023-12-15 21:24:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:02,920 INFO L225 Difference]: With dead ends: 7428 [2023-12-15 21:24:02,920 INFO L226 Difference]: Without dead ends: 5626 [2023-12-15 21:24:02,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 911 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2023-12-15 21:24:02,926 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 1942 mSDsluCounter, 3523 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1943 SdHoareTripleChecker+Valid, 3814 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:02,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1943 Valid, 3814 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-15 21:24:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2023-12-15 21:24:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 2000. [2023-12-15 21:24:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1611 states have (on average 1.451893234016139) internal successors, (2339), 1611 states have internal predecessors, (2339), 340 states have call successors, (340), 48 states have call predecessors, (340), 48 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-12-15 21:24:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 3019 transitions. [2023-12-15 21:24:03,174 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 3019 transitions. Word has length 468 [2023-12-15 21:24:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:03,174 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 3019 transitions. [2023-12-15 21:24:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 7.678571428571429) internal successors, (215), 28 states have internal predecessors, (215), 10 states have call successors, (136), 6 states have call predecessors, (136), 9 states have return successors, (136), 8 states have call predecessors, (136), 10 states have call successors, (136) [2023-12-15 21:24:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 3019 transitions. [2023-12-15 21:24:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-12-15 21:24:03,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:03,177 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:03,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-15 21:24:03,386 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1739031206, now seen corresponding path program 1 times [2023-12-15 21:24:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361160177] [2023-12-15 21:24:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:03,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730099874] [2023-12-15 21:24:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:03,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:03,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:03,434 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:03,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 21:24:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:04,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-15 21:24:04,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 6498 proven. 654 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2023-12-15 21:24:06,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361160177] [2023-12-15 21:24:16,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730099874] [2023-12-15 21:24:16,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730099874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:24:16,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 21:24:16,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-15 21:24:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247443212] [2023-12-15 21:24:16,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:16,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 21:24:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 21:24:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=879, Unknown=1, NotChecked=0, Total=1190 [2023-12-15 21:24:16,455 INFO L87 Difference]: Start difference. First operand 2000 states and 3019 transitions. Second operand has 23 states, 23 states have (on average 6.869565217391305) internal successors, (158), 20 states have internal predecessors, (158), 7 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (68), 7 states have call predecessors, (68), 7 states have call successors, (68) [2023-12-15 21:24:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:17,888 INFO L93 Difference]: Finished difference Result 3894 states and 5790 transitions. [2023-12-15 21:24:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 21:24:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.869565217391305) internal successors, (158), 20 states have internal predecessors, (158), 7 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (68), 7 states have call predecessors, (68), 7 states have call successors, (68) Word has length 468 [2023-12-15 21:24:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:17,893 INFO L225 Difference]: With dead ends: 3894 [2023-12-15 21:24:17,893 INFO L226 Difference]: Without dead ends: 2168 [2023-12-15 21:24:17,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 667 SyntacticMatches, 78 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=678, Invalid=1771, Unknown=1, NotChecked=0, Total=2450 [2023-12-15 21:24:17,896 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 567 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:17,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1109 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 21:24:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2023-12-15 21:24:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2128. [2023-12-15 21:24:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1707 states have (on average 1.4100761570005858) internal successors, (2407), 1707 states have internal predecessors, (2407), 340 states have call successors, (340), 80 states have call predecessors, (340), 80 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-12-15 21:24:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3087 transitions. [2023-12-15 21:24:18,077 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3087 transitions. Word has length 468 [2023-12-15 21:24:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:18,077 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 3087 transitions. [2023-12-15 21:24:18,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.869565217391305) internal successors, (158), 20 states have internal predecessors, (158), 7 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (68), 7 states have call predecessors, (68), 7 states have call successors, (68) [2023-12-15 21:24:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3087 transitions. [2023-12-15 21:24:18,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-12-15 21:24:18,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:18,080 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:18,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 21:24:18,289 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:18,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1176570795, now seen corresponding path program 1 times [2023-12-15 21:24:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:18,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95226811] [2023-12-15 21:24:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:18,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376747349] [2023-12-15 21:24:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:18,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:18,329 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:24:18,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 21:24:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-15 21:24:26,656 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. Received shutdown request... [2023-12-15 21:24:31,129 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:24:31,131 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:24:32,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:32,341 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forcibly destroying the process [2023-12-15 21:24:32,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 137 [2023-12-15 21:24:32,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-15 21:24:32,347 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:24:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-15 21:24:32,347 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 470 with TraceHistMax 68,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-15 21:24:32,350 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:32,352 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:24:32,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:24:32 BoogieIcfgContainer [2023-12-15 21:24:32,353 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:24:32,353 INFO L158 Benchmark]: Toolchain (without parser) took 64056.73ms. Allocated memory was 316.7MB in the beginning and 974.1MB in the end (delta: 657.5MB). Free memory was 258.1MB in the beginning and 536.5MB in the end (delta: -278.3MB). Peak memory consumption was 380.2MB. Max. memory is 8.0GB. [2023-12-15 21:24:32,353 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 217.1MB. Free memory is still 163.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:24:32,354 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.68ms. Allocated memory is still 316.7MB. Free memory was 258.1MB in the beginning and 222.5MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 8.0GB. [2023-12-15 21:24:32,354 INFO L158 Benchmark]: Boogie Procedure Inliner took 103.36ms. Allocated memory is still 316.7MB. Free memory was 222.5MB in the beginning and 207.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-15 21:24:32,354 INFO L158 Benchmark]: Boogie Preprocessor took 120.21ms. Allocated memory is still 316.7MB. Free memory was 207.8MB in the beginning and 173.2MB in the end (delta: 34.6MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2023-12-15 21:24:32,354 INFO L158 Benchmark]: RCFGBuilder took 814.92ms. Allocated memory is still 316.7MB. Free memory was 172.7MB in the beginning and 224.7MB in the end (delta: -52.0MB). Peak memory consumption was 56.0MB. Max. memory is 8.0GB. [2023-12-15 21:24:32,354 INFO L158 Benchmark]: TraceAbstraction took 62557.51ms. Allocated memory was 316.7MB in the beginning and 974.1MB in the end (delta: 657.5MB). Free memory was 224.1MB in the beginning and 536.5MB in the end (delta: -312.3MB). Peak memory consumption was 345.2MB. Max. memory is 8.0GB. [2023-12-15 21:24:32,355 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 217.1MB. Free memory is still 163.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 456.68ms. Allocated memory is still 316.7MB. Free memory was 258.1MB in the beginning and 222.5MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 103.36ms. Allocated memory is still 316.7MB. Free memory was 222.5MB in the beginning and 207.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 120.21ms. Allocated memory is still 316.7MB. Free memory was 207.8MB in the beginning and 173.2MB in the end (delta: 34.6MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. * RCFGBuilder took 814.92ms. Allocated memory is still 316.7MB. Free memory was 172.7MB in the beginning and 224.7MB in the end (delta: -52.0MB). Peak memory consumption was 56.0MB. Max. memory is 8.0GB. * TraceAbstraction took 62557.51ms. Allocated memory was 316.7MB in the beginning and 974.1MB in the end (delta: 657.5MB). Free memory was 224.1MB in the beginning and 536.5MB in the end (delta: -312.3MB). Peak memory consumption was 345.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 470 with TraceHistMax 68,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 62.5s, OverallIterations: 19, TraceHistogramMax: 68, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9823 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9796 mSDsluCounter, 22031 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14906 mSDsCounter, 1956 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7324 IncrementalHoareTripleChecker+Invalid, 9280 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1956 mSolverCounterUnsat, 7125 mSDtfsCounter, 7324 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11536 GetRequests, 11222 SyntacticMatches, 79 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4838 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2128occurred in iteration=18, InterpolantAutomatonStates: 165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 6125 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 24.6s InterpolantComputationTime, 8820 NumberOfCodeBlocks, 8820 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 11124 ConstructedInterpolants, 0 QuantifiedInterpolants, 48885 SizeOfPredicates, 75 NumberOfNonLiveVariables, 20316 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 24 InterpolantComputations, 12 PerfectInterpolantSequences, 215898/218688 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown