/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 19:24:27,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 19:24:27,509 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 19:24:27,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 19:24:27,513 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 19:24:27,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 19:24:27,526 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 19:24:27,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 19:24:27,527 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 19:24:27,527 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 19:24:27,527 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 19:24:27,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 19:24:27,528 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 19:24:27,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 19:24:27,529 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 19:24:27,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 19:24:27,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 19:24:27,529 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 19:24:27,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 19:24:27,530 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 19:24:27,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 19:24:27,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 19:24:27,531 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 19:24:27,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 19:24:27,531 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 19:24:27,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 19:24:27,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 19:24:27,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 19:24:27,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 19:24:27,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 19:24:27,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 19:24:27,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 19:24:27,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 19:24:27,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 19:24:27,533 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 19:24:27,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 19:24:27,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 19:24:27,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 19:24:27,533 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 19:24:27,534 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 19:24:27,534 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 19:24:27,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 19:24:27,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 19:24:27,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 19:24:27,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 19:24:27,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 19:24:27,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 19:24:27,733 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 19:24:27,734 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 19:24:27,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i [2023-12-20 19:24:28,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 19:24:28,903 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 19:24:28,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i [2023-12-20 19:24:28,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2dc84efd/4dc00629341f4de982b99fcefddcaff1/FLAG8e41160de [2023-12-20 19:24:28,935 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2dc84efd/4dc00629341f4de982b99fcefddcaff1 [2023-12-20 19:24:28,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 19:24:28,939 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 19:24:28,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 19:24:28,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 19:24:28,943 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 19:24:28,944 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:24:28" (1/1) ... [2023-12-20 19:24:28,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437454ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:28, skipping insertion in model container [2023-12-20 19:24:28,945 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:24:28" (1/1) ... [2023-12-20 19:24:28,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 19:24:29,073 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i[916,929] [2023-12-20 19:24:29,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 19:24:29,183 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 19:24:29,190 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i[916,929] [2023-12-20 19:24:29,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 19:24:29,241 INFO L206 MainTranslator]: Completed translation [2023-12-20 19:24:29,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29 WrapperNode [2023-12-20 19:24:29,241 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 19:24:29,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 19:24:29,242 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 19:24:29,242 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 19:24:29,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,329 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 476 [2023-12-20 19:24:29,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 19:24:29,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 19:24:29,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 19:24:29,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 19:24:29,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,344 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,371 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]. [2023-12-20 19:24:29,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,371 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,409 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 19:24:29,410 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 19:24:29,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 19:24:29,410 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 19:24:29,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (1/1) ... [2023-12-20 19:24:29,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 19:24:29,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:29,474 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) [2023-12-20 19:24:29,489 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 [2023-12-20 19:24:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 19:24:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-20 19:24:29,494 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-20 19:24:29,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 19:24:29,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 19:24:29,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 19:24:29,569 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 19:24:29,571 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 19:24:30,084 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 19:24:30,116 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 19:24:30,116 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-20 19:24:30,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:24:30 BoogieIcfgContainer [2023-12-20 19:24:30,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 19:24:30,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 19:24:30,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 19:24:30,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 19:24:30,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:24:28" (1/3) ... [2023-12-20 19:24:30,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e6ade0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:24:30, skipping insertion in model container [2023-12-20 19:24:30,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:24:29" (2/3) ... [2023-12-20 19:24:30,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e6ade0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:24:30, skipping insertion in model container [2023-12-20 19:24:30,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:24:30" (3/3) ... [2023-12-20 19:24:30,130 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-10.i [2023-12-20 19:24:30,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 19:24:30,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 19:24:30,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 19:24:30,261 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;@6d02220b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 19:24:30,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 19:24:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 126 states have (on average 1.5396825396825398) internal successors, (194), 127 states have internal predecessors, (194), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-12-20 19:24:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-12-20 19:24:30,310 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:30,311 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:30,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:30,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1133453801, now seen corresponding path program 1 times [2023-12-20 19:24:30,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:30,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226952540] [2023-12-20 19:24:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:30,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:30,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:30,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226952540] [2023-12-20 19:24:30,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 19:24:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779234834] [2023-12-20 19:24:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:30,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:30,504 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) [2023-12-20 19:24:30,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 19:24:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:30,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 19:24:30,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2023-12-20 19:24:30,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 19:24:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779234834] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 19:24:30,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 19:24:30,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 19:24:30,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641395206] [2023-12-20 19:24:30,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 19:24:30,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 19:24:30,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 19:24:30,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 19:24:30,805 INFO L87 Difference]: Start difference. First operand has 201 states, 126 states have (on average 1.5396825396825398) internal successors, (194), 127 states have internal predecessors, (194), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-12-20 19:24:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:30,860 INFO L93 Difference]: Finished difference Result 398 states and 744 transitions. [2023-12-20 19:24:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 19:24:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) Word has length 450 [2023-12-20 19:24:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:30,871 INFO L225 Difference]: With dead ends: 398 [2023-12-20 19:24:30,871 INFO L226 Difference]: Without dead ends: 198 [2023-12-20 19:24:30,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 19:24:30,880 INFO L413 NwaCegarLoop]: 327 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, 327 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 [2023-12-20 19:24:30,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 327 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 19:24:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-20 19:24:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-12-20 19:24:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 124 states have (on average 1.5) internal successors, (186), 124 states have internal predecessors, (186), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-12-20 19:24:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 330 transitions. [2023-12-20 19:24:30,940 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 330 transitions. Word has length 450 [2023-12-20 19:24:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:30,942 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 330 transitions. [2023-12-20 19:24:30,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-12-20 19:24:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 330 transitions. [2023-12-20 19:24:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-12-20 19:24:30,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:30,949 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:30,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 19:24:31,155 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 [2023-12-20 19:24:31,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:31,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1854615243, now seen corresponding path program 1 times [2023-12-20 19:24:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:31,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216587166] [2023-12-20 19:24:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:31,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:31,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554545297] [2023-12-20 19:24:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:31,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:31,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:31,282 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) [2023-12-20 19:24:31,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 19:24:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:31,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 19:24:31,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-20 19:24:31,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 19:24:31,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216587166] [2023-12-20 19:24:31,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:24:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554545297] [2023-12-20 19:24:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554545297] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 19:24:31,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 19:24:31,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 19:24:31,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101173890] [2023-12-20 19:24:31,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 19:24:31,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 19:24:31,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 19:24:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:31,558 INFO L87 Difference]: Start difference. First operand 198 states and 330 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:31,632 INFO L93 Difference]: Finished difference Result 505 states and 842 transitions. [2023-12-20 19:24:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 19:24:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 450 [2023-12-20 19:24:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:31,638 INFO L225 Difference]: With dead ends: 505 [2023-12-20 19:24:31,638 INFO L226 Difference]: Without dead ends: 308 [2023-12-20 19:24:31,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:31,641 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 175 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 19:24:31,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 640 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 19:24:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-12-20 19:24:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 305. [2023-12-20 19:24:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 200 states have (on average 1.525) internal successors, (305), 201 states have internal predecessors, (305), 102 states have call successors, (102), 2 states have call predecessors, (102), 2 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2023-12-20 19:24:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 509 transitions. [2023-12-20 19:24:31,715 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 509 transitions. Word has length 450 [2023-12-20 19:24:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:31,717 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 509 transitions. [2023-12-20 19:24:31,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 509 transitions. [2023-12-20 19:24:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-12-20 19:24:31,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:31,722 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:31,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 19:24:31,928 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 [2023-12-20 19:24:31,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:31,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash -250082535, now seen corresponding path program 1 times [2023-12-20 19:24:31,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637504989] [2023-12-20 19:24:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:32,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:32,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055302928] [2023-12-20 19:24:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:32,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:32,014 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) [2023-12-20 19:24:32,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 19:24:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:32,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 19:24:32,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-20 19:24:32,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 19:24:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637504989] [2023-12-20 19:24:32,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:24:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055302928] [2023-12-20 19:24:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055302928] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 19:24:32,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 19:24:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 19:24:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30392135] [2023-12-20 19:24:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 19:24:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 19:24:32,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 19:24:32,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:32,316 INFO L87 Difference]: Start difference. First operand 305 states and 509 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:32,364 INFO L93 Difference]: Finished difference Result 828 states and 1379 transitions. [2023-12-20 19:24:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 19:24:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 451 [2023-12-20 19:24:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:32,369 INFO L225 Difference]: With dead ends: 828 [2023-12-20 19:24:32,369 INFO L226 Difference]: Without dead ends: 524 [2023-12-20 19:24:32,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:32,370 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 192 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 19:24:32,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 738 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 19:24:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-12-20 19:24:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 521. [2023-12-20 19:24:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 346 states have (on average 1.5144508670520231) internal successors, (524), 349 states have internal predecessors, (524), 170 states have call successors, (170), 4 states have call predecessors, (170), 4 states have return successors, (170), 167 states have call predecessors, (170), 170 states have call successors, (170) [2023-12-20 19:24:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 864 transitions. [2023-12-20 19:24:32,397 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 864 transitions. Word has length 451 [2023-12-20 19:24:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:32,398 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 864 transitions. [2023-12-20 19:24:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 864 transitions. [2023-12-20 19:24:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-12-20 19:24:32,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:32,401 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:32,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 19:24:32,607 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 [2023-12-20 19:24:32,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:32,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1136120859, now seen corresponding path program 1 times [2023-12-20 19:24:32,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:32,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418584620] [2023-12-20 19:24:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:32,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:32,640 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739583500] [2023-12-20 19:24:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:32,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:32,657 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) [2023-12-20 19:24:32,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 19:24:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:32,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 19:24:32,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-20 19:24:32,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 19:24:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418584620] [2023-12-20 19:24:32,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:24:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739583500] [2023-12-20 19:24:32,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739583500] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 19:24:32,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 19:24:32,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 19:24:32,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443462517] [2023-12-20 19:24:32,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 19:24:32,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 19:24:32,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 19:24:32,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:32,913 INFO L87 Difference]: Start difference. First operand 521 states and 864 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:32,979 INFO L93 Difference]: Finished difference Result 1557 states and 2582 transitions. [2023-12-20 19:24:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 19:24:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 451 [2023-12-20 19:24:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:32,984 INFO L225 Difference]: With dead ends: 1557 [2023-12-20 19:24:32,984 INFO L226 Difference]: Without dead ends: 1037 [2023-12-20 19:24:32,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:32,987 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 319 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 19:24:32,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 646 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 19:24:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-12-20 19:24:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 549. [2023-12-20 19:24:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 374 states have (on average 1.5080213903743316) internal successors, (564), 377 states have internal predecessors, (564), 170 states have call successors, (170), 4 states have call predecessors, (170), 4 states have return successors, (170), 167 states have call predecessors, (170), 170 states have call successors, (170) [2023-12-20 19:24:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 904 transitions. [2023-12-20 19:24:33,035 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 904 transitions. Word has length 451 [2023-12-20 19:24:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:33,035 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 904 transitions. [2023-12-20 19:24:33,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 904 transitions. [2023-12-20 19:24:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-12-20 19:24:33,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:33,040 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:33,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 19:24:33,246 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 [2023-12-20 19:24:33,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:33,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash 326774233, now seen corresponding path program 1 times [2023-12-20 19:24:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:33,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542769429] [2023-12-20 19:24:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:33,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:33,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142765625] [2023-12-20 19:24:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:33,302 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) [2023-12-20 19:24:33,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 19:24:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:33,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 19:24:33,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4631 proven. 141 refuted. 0 times theorem prover too weak. 5452 trivial. 0 not checked. [2023-12-20 19:24:33,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 19:24:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 72 proven. 141 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-20 19:24:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542769429] [2023-12-20 19:24:34,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:24:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142765625] [2023-12-20 19:24:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142765625] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 19:24:34,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 19:24:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-20 19:24:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74336883] [2023-12-20 19:24:34,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 19:24:34,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 19:24:34,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 19:24:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-12-20 19:24:34,190 INFO L87 Difference]: Start difference. First operand 549 states and 904 transitions. Second operand has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-12-20 19:24:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:35,562 INFO L93 Difference]: Finished difference Result 2132 states and 3421 transitions. [2023-12-20 19:24:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 19:24:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 451 [2023-12-20 19:24:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:35,568 INFO L225 Difference]: With dead ends: 2132 [2023-12-20 19:24:35,568 INFO L226 Difference]: Without dead ends: 1584 [2023-12-20 19:24:35,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 19:24:35,570 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1371 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 19:24:35,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 1400 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 19:24:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2023-12-20 19:24:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1074. [2023-12-20 19:24:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 755 states have (on average 1.4874172185430463) internal successors, (1123), 762 states have internal predecessors, (1123), 294 states have call successors, (294), 24 states have call predecessors, (294), 24 states have return successors, (294), 287 states have call predecessors, (294), 294 states have call successors, (294) [2023-12-20 19:24:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1711 transitions. [2023-12-20 19:24:35,622 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1711 transitions. Word has length 451 [2023-12-20 19:24:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:35,623 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1711 transitions. [2023-12-20 19:24:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-12-20 19:24:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1711 transitions. [2023-12-20 19:24:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-12-20 19:24:35,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:35,626 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:35,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 19:24:35,833 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 [2023-12-20 19:24:35,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:35,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1647383378, now seen corresponding path program 1 times [2023-12-20 19:24:35,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:35,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730300504] [2023-12-20 19:24:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:35,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:35,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733958660] [2023-12-20 19:24:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:35,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:35,886 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) [2023-12-20 19:24:35,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 19:24:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:36,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 19:24:36,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-20 19:24:36,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 19:24:36,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730300504] [2023-12-20 19:24:36,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:24:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733958660] [2023-12-20 19:24:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733958660] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 19:24:36,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 19:24:36,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 19:24:36,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300293971] [2023-12-20 19:24:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 19:24:36,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 19:24:36,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 19:24:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:36,502 INFO L87 Difference]: Start difference. First operand 1074 states and 1711 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:36,626 INFO L93 Difference]: Finished difference Result 3220 states and 5131 transitions. [2023-12-20 19:24:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 19:24:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 452 [2023-12-20 19:24:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:36,635 INFO L225 Difference]: With dead ends: 3220 [2023-12-20 19:24:36,635 INFO L226 Difference]: Without dead ends: 2147 [2023-12-20 19:24:36,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 19:24:36,638 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 107 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 19:24:36,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 649 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 19:24:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2023-12-20 19:24:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2137. [2023-12-20 19:24:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1500 states have (on average 1.48) internal successors, (2220), 1514 states have internal predecessors, (2220), 588 states have call successors, (588), 48 states have call predecessors, (588), 48 states have return successors, (588), 574 states have call predecessors, (588), 588 states have call successors, (588) [2023-12-20 19:24:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3396 transitions. [2023-12-20 19:24:36,759 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3396 transitions. Word has length 452 [2023-12-20 19:24:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:36,760 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 3396 transitions. [2023-12-20 19:24:36,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3396 transitions. [2023-12-20 19:24:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-12-20 19:24:36,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:36,764 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:36,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 19:24:36,971 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 [2023-12-20 19:24:36,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:36,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash 958640176, now seen corresponding path program 1 times [2023-12-20 19:24:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335046217] [2023-12-20 19:24:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:37,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:37,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252422969] [2023-12-20 19:24:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:37,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:37,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:37,022 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) [2023-12-20 19:24:37,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 19:24:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:37,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 19:24:37,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-20 19:24:38,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 19:24:38,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:24:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335046217] [2023-12-20 19:24:38,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:24:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252422969] [2023-12-20 19:24:38,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252422969] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 19:24:38,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 19:24:38,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 19:24:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304145846] [2023-12-20 19:24:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 19:24:38,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 19:24:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:24:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 19:24:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 19:24:38,102 INFO L87 Difference]: Start difference. First operand 2137 states and 3396 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:24:38,375 INFO L93 Difference]: Finished difference Result 5328 states and 8540 transitions. [2023-12-20 19:24:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 19:24:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 452 [2023-12-20 19:24:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:24:38,386 INFO L225 Difference]: With dead ends: 5328 [2023-12-20 19:24:38,387 INFO L226 Difference]: Without dead ends: 3192 [2023-12-20 19:24:38,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 19:24:38,392 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 329 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 19:24:38,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1280 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 19:24:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2023-12-20 19:24:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 2724. [2023-12-20 19:24:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2011 states have (on average 1.5430134261561412) internal successors, (3103), 2025 states have internal predecessors, (3103), 660 states have call successors, (660), 52 states have call predecessors, (660), 52 states have return successors, (660), 646 states have call predecessors, (660), 660 states have call successors, (660) [2023-12-20 19:24:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4423 transitions. [2023-12-20 19:24:38,517 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4423 transitions. Word has length 452 [2023-12-20 19:24:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:24:38,517 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 4423 transitions. [2023-12-20 19:24:38,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-20 19:24:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4423 transitions. [2023-12-20 19:24:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-20 19:24:38,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:24:38,521 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:24:38,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 19:24:38,728 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 [2023-12-20 19:24:38,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:24:38,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:24:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 816749435, now seen corresponding path program 1 times [2023-12-20 19:24:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:24:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083157955] [2023-12-20 19:24:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:24:38,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:24:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322520909] [2023-12-20 19:24:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:24:38,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:24:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:24:38,783 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) [2023-12-20 19:24:38,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 19:24:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:24:39,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 19:24:39,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:24:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2103 proven. 189 refuted. 0 times theorem prover too weak. 7932 trivial. 0 not checked. [2023-12-20 19:24:40,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 19:25:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 24 proven. 189 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-20 19:25:12,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:25:12,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083157955] [2023-12-20 19:25:12,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:25:12,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322520909] [2023-12-20 19:25:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322520909] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 19:25:12,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 19:25:12,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2023-12-20 19:25:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801771684] [2023-12-20 19:25:12,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 19:25:12,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 19:25:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:25:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 19:25:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=295, Unknown=1, NotChecked=0, Total=380 [2023-12-20 19:25:12,187 INFO L87 Difference]: Start difference. First operand 2724 states and 4423 transitions. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-12-20 19:25:36,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:25:40,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:25:44,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:25:56,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:00,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:04,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:20,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:24,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:28,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:39,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:43,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:47,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:26:51,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:27:08,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-12-20 19:27:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:27:08,704 INFO L93 Difference]: Finished difference Result 8756 states and 13482 transitions. [2023-12-20 19:27:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-20 19:27:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 453 [2023-12-20 19:27:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:27:08,725 INFO L225 Difference]: With dead ends: 8756 [2023-12-20 19:27:08,725 INFO L226 Difference]: Without dead ends: 6620 [2023-12-20 19:27:08,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=826, Invalid=3862, Unknown=4, NotChecked=0, Total=4692 [2023-12-20 19:27:08,732 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1915 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 415 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.9s IncrementalHoareTripleChecker+Time [2023-12-20 19:27:08,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 2494 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 2206 Invalid, 14 Unknown, 0 Unchecked, 58.9s Time] [2023-12-20 19:27:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2023-12-20 19:27:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 4200. [2023-12-20 19:27:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 3278 states have (on average 1.4929835265405735) internal successors, (4894), 3324 states have internal predecessors, (4894), 820 states have call successors, (820), 101 states have call predecessors, (820), 101 states have return successors, (820), 774 states have call predecessors, (820), 820 states have call successors, (820) [2023-12-20 19:27:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6534 transitions. [2023-12-20 19:27:09,011 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6534 transitions. Word has length 453 [2023-12-20 19:27:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:27:09,011 INFO L495 AbstractCegarLoop]: Abstraction has 4200 states and 6534 transitions. [2023-12-20 19:27:09,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-12-20 19:27:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6534 transitions. [2023-12-20 19:27:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-20 19:27:09,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:27:09,015 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:27:09,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-20 19:27:09,221 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 [2023-12-20 19:27:09,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:27:09,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:27:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1389007557, now seen corresponding path program 1 times [2023-12-20 19:27:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:27:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903045929] [2023-12-20 19:27:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:27:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:27:09,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:27:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258903529] [2023-12-20 19:27:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:27:09,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:27:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:27:09,279 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) [2023-12-20 19:27:09,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 19:27:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:27:09,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 19:27:09,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:27:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3373 proven. 717 refuted. 0 times theorem prover too weak. 6134 trivial. 0 not checked. [2023-12-20 19:27:11,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 19:27:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 102 proven. 528 refuted. 0 times theorem prover too weak. 9594 trivial. 0 not checked. [2023-12-20 19:27:12,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:27:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903045929] [2023-12-20 19:27:12,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:27:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258903529] [2023-12-20 19:27:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258903529] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 19:27:12,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 19:27:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-12-20 19:27:12,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743265386] [2023-12-20 19:27:12,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 19:27:12,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 19:27:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:27:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 19:27:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-12-20 19:27:12,199 INFO L87 Difference]: Start difference. First operand 4200 states and 6534 transitions. Second operand has 32 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 7 states have call successors, (133), 4 states have call predecessors, (133), 9 states have return successors, (135), 7 states have call predecessors, (135), 7 states have call successors, (135) [2023-12-20 19:27:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:27:15,154 INFO L93 Difference]: Finished difference Result 12036 states and 17432 transitions. [2023-12-20 19:27:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-20 19:27:15,154 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 7 states have call successors, (133), 4 states have call predecessors, (133), 9 states have return successors, (135), 7 states have call predecessors, (135), 7 states have call successors, (135) Word has length 453 [2023-12-20 19:27:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:27:15,183 INFO L225 Difference]: With dead ends: 12036 [2023-12-20 19:27:15,184 INFO L226 Difference]: Without dead ends: 8636 [2023-12-20 19:27:15,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1343, Invalid=4059, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 19:27:15,193 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1353 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 2014 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 19:27:15,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 2014 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 19:27:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2023-12-20 19:27:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 6220. [2023-12-20 19:27:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6220 states, 5005 states have (on average 1.4203796203796204) internal successors, (7109), 5099 states have internal predecessors, (7109), 980 states have call successors, (980), 234 states have call predecessors, (980), 234 states have return successors, (980), 886 states have call predecessors, (980), 980 states have call successors, (980) [2023-12-20 19:27:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6220 states to 6220 states and 9069 transitions. [2023-12-20 19:27:15,680 INFO L78 Accepts]: Start accepts. Automaton has 6220 states and 9069 transitions. Word has length 453 [2023-12-20 19:27:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:27:15,681 INFO L495 AbstractCegarLoop]: Abstraction has 6220 states and 9069 transitions. [2023-12-20 19:27:15,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 7 states have call successors, (133), 4 states have call predecessors, (133), 9 states have return successors, (135), 7 states have call predecessors, (135), 7 states have call successors, (135) [2023-12-20 19:27:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6220 states and 9069 transitions. [2023-12-20 19:27:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-20 19:27:15,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:27:15,685 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:27:15,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 19:27:15,912 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 [2023-12-20 19:27:15,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:27:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:27:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1906160581, now seen corresponding path program 1 times [2023-12-20 19:27:15,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:27:15,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181999587] [2023-12-20 19:27:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:27:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:27:15,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:27:15,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999690902] [2023-12-20 19:27:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:27:15,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:27:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:27:15,974 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) [2023-12-20 19:27:15,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 19:27:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:27:16,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-20 19:27:16,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:27:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3017 proven. 1401 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2023-12-20 19:27:28,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 19:28:32,905 WARN L293 SmtUtils]: Spent 13.26s on a formula simplification that was a NOOP. DAG size: 344 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 19:29:10,912 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 383 DAG size of output: 382 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 19:29:29,683 WARN L293 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 386 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 19:31:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 19:31:45,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181999587] [2023-12-20 19:31:45,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 19:31:45,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999690902] [2023-12-20 19:31:45,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999690902] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 19:31:45,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 19:31:45,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2023-12-20 19:31:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074730089] [2023-12-20 19:31:45,384 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 19:31:45,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 19:31:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 19:31:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 19:31:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=2176, Unknown=2, NotChecked=0, Total=2652 [2023-12-20 19:31:45,386 INFO L87 Difference]: Start difference. First operand 6220 states and 9069 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 36 states have internal predecessors, (129), 9 states have call successors, (72), 9 states have call predecessors, (72), 12 states have return successors, (72), 8 states have call predecessors, (72), 9 states have call successors, (72) [2023-12-20 19:31:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 19:31:53,469 INFO L93 Difference]: Finished difference Result 12594 states and 18068 transitions. [2023-12-20 19:31:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-20 19:31:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 36 states have internal predecessors, (129), 9 states have call successors, (72), 9 states have call predecessors, (72), 12 states have return successors, (72), 8 states have call predecessors, (72), 9 states have call successors, (72) Word has length 453 [2023-12-20 19:31:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 19:31:53,489 INFO L225 Difference]: With dead ends: 12594 [2023-12-20 19:31:53,490 INFO L226 Difference]: Without dead ends: 7434 [2023-12-20 19:31:53,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4135 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=2171, Invalid=11167, Unknown=2, NotChecked=0, Total=13340 [2023-12-20 19:31:53,500 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1009 mSDsluCounter, 2724 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 19:31:53,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 2979 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 19:31:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2023-12-20 19:31:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 6316. [2023-12-20 19:31:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 5097 states have (on average 1.4190700412007062) internal successors, (7233), 5191 states have internal predecessors, (7233), 980 states have call successors, (980), 238 states have call predecessors, (980), 238 states have return successors, (980), 886 states have call predecessors, (980), 980 states have call successors, (980) [2023-12-20 19:31:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 9193 transitions. [2023-12-20 19:31:53,907 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 9193 transitions. Word has length 453 [2023-12-20 19:31:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 19:31:53,908 INFO L495 AbstractCegarLoop]: Abstraction has 6316 states and 9193 transitions. [2023-12-20 19:31:53,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 36 states have internal predecessors, (129), 9 states have call successors, (72), 9 states have call predecessors, (72), 12 states have return successors, (72), 8 states have call predecessors, (72), 9 states have call successors, (72) [2023-12-20 19:31:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 9193 transitions. [2023-12-20 19:31:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-20 19:31:53,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 19:31:53,912 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:31:53,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 19:31:54,119 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 [2023-12-20 19:31:54,119 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 19:31:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 19:31:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash -687942979, now seen corresponding path program 1 times [2023-12-20 19:31:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 19:31:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190094242] [2023-12-20 19:31:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:31:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 19:31:54,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 19:31:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394975357] [2023-12-20 19:31:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 19:31:54,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 19:31:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 19:31:54,157 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) [2023-12-20 19:31:54,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 19:31:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 19:31:54,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-20 19:31:54,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 19:32:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3227 proven. 945 refuted. 0 times theorem prover too weak. 6052 trivial. 0 not checked. [2023-12-20 19:32:05,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 19:33:01,039 WARN L293 SmtUtils]: Spent 11.99s on a formula simplification. DAG size of input: 801 DAG size of output: 799 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 19:34:01,860 WARN L293 SmtUtils]: Spent 22.22s on a formula simplification that was a NOOP. DAG size: 788 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 19:35:25,545 WARN L293 SmtUtils]: Spent 15.17s on a formula simplification that was a NOOP. DAG size: 791 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-20 19:38:55,467 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 19:38:55,471 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 [2023-12-20 19:38:56,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 19:38:56,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 19:38:56,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 19:38:56,614 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 454 with TraceHistMax 72,while TraceCheckSpWp was constructing backward predicates,while executing Executor. [2023-12-20 19:38:56,616 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 19:38:56,618 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 19:38:56,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 07:38:56 BoogieIcfgContainer [2023-12-20 19:38:56,619 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 19:38:56,619 INFO L158 Benchmark]: Toolchain (without parser) took 867680.65ms. Allocated memory was 230.7MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 177.7MB in the beginning and 721.0MB in the end (delta: -543.3MB). Peak memory consumption was 988.7MB. Max. memory is 8.0GB. [2023-12-20 19:38:56,619 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 191.9MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 19:38:56,620 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.66ms. Allocated memory is still 230.7MB. Free memory was 177.7MB in the beginning and 153.4MB in the end (delta: 24.3MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-12-20 19:38:56,620 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.42ms. Allocated memory is still 230.7MB. Free memory was 153.1MB in the beginning and 191.7MB in the end (delta: -38.5MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-20 19:38:56,620 INFO L158 Benchmark]: Boogie Preprocessor took 79.26ms. Allocated memory is still 230.7MB. Free memory was 191.1MB in the beginning and 179.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 19:38:56,620 INFO L158 Benchmark]: RCFGBuilder took 706.86ms. Allocated memory is still 230.7MB. Free memory was 179.1MB in the beginning and 122.5MB in the end (delta: 56.6MB). Peak memory consumption was 56.6MB. Max. memory is 8.0GB. [2023-12-20 19:38:56,620 INFO L158 Benchmark]: TraceAbstraction took 866493.96ms. Allocated memory was 230.7MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 121.9MB in the beginning and 721.0MB in the end (delta: -599.1MB). Peak memory consumption was 932.1MB. Max. memory is 8.0GB. [2023-12-20 19:38:56,621 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 191.9MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 301.66ms. Allocated memory is still 230.7MB. Free memory was 177.7MB in the beginning and 153.4MB in the end (delta: 24.3MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 87.42ms. Allocated memory is still 230.7MB. Free memory was 153.1MB in the beginning and 191.7MB in the end (delta: -38.5MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 79.26ms. Allocated memory is still 230.7MB. Free memory was 191.1MB in the beginning and 179.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * RCFGBuilder took 706.86ms. Allocated memory is still 230.7MB. Free memory was 179.1MB in the beginning and 122.5MB in the end (delta: 56.6MB). Peak memory consumption was 56.6MB. Max. memory is 8.0GB. * TraceAbstraction took 866493.96ms. Allocated memory was 230.7MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 121.9MB in the beginning and 721.0MB in the end (delta: -599.1MB). Peak memory consumption was 932.1MB. 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 454 with TraceHistMax 72,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 201 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 866.4s, OverallIterations: 11, TraceHistogramMax: 72, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 129.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 6808 SdHoareTripleChecker+Valid, 63.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6770 mSDsluCounter, 13167 SdHoareTripleChecker+Invalid, 62.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9950 mSDsCounter, 1527 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7681 IncrementalHoareTripleChecker+Invalid, 9222 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1527 mSolverCounterUnsat, 3217 mSDtfsCounter, 7681 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6100 GetRequests, 5802 SyntacticMatches, 0 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7083 ImplicationChecksByTransitivity, 137.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6316occurred in iteration=10, InterpolantAutomatonStates: 238, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 10 MinimizatonAttempts, 7436 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 307.1s InterpolantComputationTime, 4966 NumberOfCodeBlocks, 4966 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 5860 ConstructedInterpolants, 10 QuantifiedInterpolants, 49555 SizeOfPredicates, 77 NumberOfNonLiveVariables, 9846 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 129606/132912 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